I’m a freelancer, so in my case I’d complete any projects I’d already taken on and then just not take on any more.
To answer for my previous job, which was a regular office job, I’d give my two weeks notice. Or more if they asked me to stay longer. I liked my employers and wouldn’t have wanted to shaft them.
Definitely give notice. Depending on how much I won I may even stay on at the job for a while longer.
Were I still at my last job, I’d give notice because I like my boss and it’s hard to fill my position, so I wouldn’t want to put her through that. This job? I’d just not show up and dispatch a singing telegram to serenade, “Fuck all y’all.”
I’m a teacher. If I won the lotto, I could stay a teacher instead of getting a principal’s license to pay the bills.
…then I’d open up a school/home for girls and work til I died. (:
I’d give notice. A lot of the things that I don’t like about my job wouldn’t seem so bad if I knew I’d be leaving soon. 
Gosh. That’s one of the nicest things I have heard in a while.
I am glad you are a teacher.
JFTR, I’m assuming you mean a sum you could live off for life.
I could hand my work over to someone else fairly easily, and nobody would suffer hugely if some of it weren’t done (its kinda important, for a media job, but a couple of missed programmes wouldn’t kill anyone), so I’d quit immediately.
When I was teaching I’d have stayed on for a while, at least until the end of term, possibly till the end of the year.
I love my job, but it’s a non-profit. I wouldn’t feel right taking a paycheck if I had enough bank to live on without it. I would stay on, but probably as a volunteer, and if they wouldn’t be able to give me the same privileges as a volunteer, then I would probably donate the equivalent of salary + benefits and stay on as a part-timer. I’ve been here for 10 years and I do a few things that no one else knows how to do, and it’s a great place to come to a few days a week.
I said 2 weeks notice. That’s mainly to verify the ticket, change/cancel phone numbers, enlist attorneys/financial advisers, etc and just in general get a grip on things.
After that - watch my dust. 
UT
I don’t think I’d quit, I rather like my job. I work with a closeknit group and I wouldn’t want to screw 'em, and the owner’s a great, generous guy who I quite like. I’d probably take him aside, explain the situation so he didn’t find out another way, but assure him I had no immediate plans for leaving; if I decided otherwise, I’d give lots of notice and hang around for plenty of time to train and hire a replacement. And I’d ask the conversation be confidential because I wouldn’t want people at work to be weird around me. Also, a couple of my co-workers would receive anonymous gifts for cash, as I know a couple are a little strapped with family and all, and it would make a big difference to them; I wouldn’t want them to figure it out.
I don’t love every single thing about it, but I’m a single person who can be a bit of a homebody, I don’t think it would be all that good for me to suddenly have no work responsibilities. I sure as hell would hire some people to make the rest of my time enjoyable and to deal with the housework and stuff.
In the long term I’d probably want to eventually move into volunteering, hell even starting a charity of my own, and travel a lot more than my work could really accommodate… but that’s probably years away. I’d want to get things squared away in order financially, make long term plans for what I could spend each month (even the highest lotto wins aren’t unlimited), work out taxes, sell my house and move someplace better in the area, talk about things with my immediate family and all that before I just leapt up and quit a job I like and abandon my whole routine. Basically, I’d want to figure out a new long term plan for my life.
Other jobs I’ve had in the past? Fuck 'em, mostly. They sure as hell would have let me go with zero notice if it suited them, and now that I don’t need to worry about landing another job, I don’t really need to worry about giving notice. They weren’t doing me any favors and generally stressed the shit out of me.
I wouldn’t even go back from lunch, let them send me whatever they want to.
I would give notice but mainly just cleanup and work short days for a shortish time. I’m assuming this is a sizable lottery winning. At least $6m or more. At $4 million I might need to work for a while longer but early retirement would not be too far off.
I have 30 years on September 29th. That would be my last day. Between now and then I’d have 6 weeks of vacation and a bunch of sick days to burn.
^^^^^ This. I like what I do. Winning the lotto or (since I don’t play the lottery) somehow inheriting a zillion dollars from some long-forgotten great-aunt or something would not make me want to stop doing it. It would just give me a heck of a lot of security and lack of worry about the job evaporating out from under me.
I don’t believe you. You’d get up every day at 7am even though you didn’t have to? Put up with quarterly reviews which would never have any direct effect on you? Continue at the same level of employment even when subordinates were wanting promotion and you could easily leave to have an eternal holiday or look after orphans in Somalia, but your subordinates’ only realistic option within your company was moving up into your job?1
Even if you had the money start a new company where you still work but on your terms? I mean, there’s a difference between giving up your specific job and giving up working.
I work from home. I don’t get up at 7 am. I don’t have to cope with horrid office politics or dress codes. I get up by 9, usually earlier, and I’m at my desk by 10. Four days a week. The fifth day is flex time and I put in those 7 hours at my convenience. I use my own computer (and in fact not once in my life, in any permanent job, have I had to spend my days sitting in front of some employer’s locked-down Pee Cee). No quarterly reviews. There are no subordinates clamoring for my job: the only risk along those lines is my boss learning my skills to the point he no longer needs me, but really even then he has too much other stuff occupying his time. He’s more properly my primary client, not my boss, I’m actually self-employed when you get right down to it (but I’d need another highly lucrative client to replace him were he to cease using my services, so it would be the equiv of getting fired).
I have a terrific job–my immediate co-workers are like family and I love the residents that we teach. It would take at least three months to transition out of having me around, so that’s probably how long I’d stay. That would also give me time to hand all of my patients over to my colleagues.
I wouldn’t even quit the job except that if I had big lotto money I would want to travel pretty much full time.
Another reason to stay around: I work for a cash-strapped university that also happens to be my alma mater. When the brass found out that some assistant professor at one of the podunk satellite campuses was suddenly worth nine figures, the rimjob that I’d suddenly find myself receiving from the administration would be legendary. I could tell them I wanted to see the head basketball and football coaches bare-knuckle box for my amusement and they’d round up a chopper to fly them down.
It would be worth hanging around for a while just to make them kneel before Zod a little bit.
Can you not, even in this fantasy situation, think of any better way to spend your time? Seriously? You couldn’t do the same, maybe for fewer hours if you choose, but with the same comforting routine, for a really good charity?
I like what I do, but let’s face it, if I had the money I would probably, um, form a company that would compete with my current employer. And they would probably realize that. So while I would give notice to be polite, I don’t know that I would actually be around the whole two weeks.
I wouldn’t quit. I love my job, love my coworkers and I’m good at what I do. As jobs go it’s relatively secure and the benefits are decent. Career wise I’ve never been happier. Plus I know myself - if I had tons of money and could stay at home all day I’d be lazy as hell.
If I DID quit, I’d give plenty of notice, but it wouldn’t make much of a difference. We’re in a hiring freeze so nobody would be replacing me for a while so my work would get farmed out throughout the (enormous) building. I’d want to stick around long enough to where the work that did get farmed out wouldn’t be too much of a mess for others to fix, though.