This thread got me thinking:
Have YOU invented a word? Is it in relatively common use?
As for myself the only “words” I have invented are basically acronyms and are generally used by only my personal circle of friends (as far as I know).
[relevant hijack]
From Blackadder III
[/relevant hijack]
Transphylite – someone who thinks he’s really an animal and wants a species change operation. If there’s ever a need for the word, the OED is going to list me first, since I was the first publication.
Yes, many words Click on the link “Wordlist”.
But you’d have to look at the grammar page to see how to properly use them.
A disastrophe is when an already bad situation gets even worse.
Upon moving to San Diego, I decided that the weather here is a perpetual state of sprautumn.
My last job was as a newspaper editor, and we used QuarkExpress to build the pages. At some point I turned the name of the software into a verb-- as in, “I quarked the front page.”
Anyway, it’s been over a year since I started saying it, and I’ve been gone for about six months, but apparently it’s spread beyond just the newspaper I worked for, and everyone in the entire (parent) comapny is using it. 
Happy
A word we developed in college. Or was it high school? Hmmm, funny how that time seems a fog.
sphericalastroconomicability adj. The feeling that you are surrounded, three dimensionally, by space.
I invented what, to my ears, sounds like a voodoo curse.
CAB-YA!!
It stands for, “Crash And Burn, You Asshole!!” Best if pronounced with a soft “a”, and the final syllable drawn out as long as possible.
I thought up the word ignoxious one night. It comes, of course, from a cross between the words obnoxious and ignorant, and applies well to inebraites.
Here I am, thinking I’m being all clever. But I just “google-d” this word, and found it at www.pseudodictionary.com - so I wasn’t the only one to think of it.
I invented “stonar”. This is the ability to detect if a person smokes dope. It’s inspired by “gaydar”.
While I was watching the marathon Pens-Flyers game a few years ago (goddamn Flyers) I made the comment after the winning goal was scored that the people in Philly were probably going berserk at the moment. But I also thought “bonkers” fit. So my mouth, in its infinite wisdom, decided on “berzonkers”. I kinda like it, actually.
What about inventing slang? I’ve pretty much got everyone I know using “Homer” to refer to marijuana…
(Drugs have the best potential for creating new words, mostly because they put people in the perfect state to think of new ridiculosity.)
Not **that ** widely spread but beyond just the circle of friends that coined them:
**ningher ** : an onomatopoeic word to cover all the class of diggers, mobile cranes, earth-movers and other bright yellow wheeled construction equipment. When the business end gets going they all go “NNIINNGGHH !!!”, and so are…
stone : originallly acroym for Stop Talking Only Junk but later modified to allow for easier pronounciation.
I coined the term “globality.”
Which is, of course, a measure of the ease with which an idea or expression moves between cultures.
At the time the word was something of a joke, buried in a PowerPoint for a company renowned for both its multicultural cluelessness and its love of wordification (another of my creations).
Today, well, it’s all grown up. 
A good friend of mine in college wanted to coin a term to describe movies that were stupid, but funny. She came up with “stunny”, but I suggested “fupid” (“foo-pid”) because “stunny” sounds too much like “stunning”.
I think making up cromulent new words is totally stuponfucious. My name here is a nickname I use in real life (utterly made-up). Words like “verticality” and “vortex” and “lumberjack” and even “box” all have different meanings to me than they probably do to you. “Dongtar” is a place, but it’s also an interjection.
And don’t even get me started on words that corporate America makes up. “This slide talks to how our team is going to socialize these issues before the next shoulder-to-shoulder. We can keep these from impacting your program, but they may interfere with the letter of some of your motherhood documents.”
- explains
- talk about
- problems
- meeting
- affecting
- marketing or P.R. statements containing only the blandest of totally non-controntational information (from “motherhood and apple pie” - statements like “our program is going to succeed by launching a satellite.”)
GIGRUNDOUS - (Sort of a combination of "Gigantic, Horrendous, & Humongous)
I use it when I need to exaggerate the enormity and hideousness of something like a big hairy spider crawling on the ceiling directly above my face.
What in actuality is only about 2cm wide will look like to me to be the size of a full grown cat. This is when I bust out “gigrundous”
Nobody seemed to use “fucknugget” before me, and it hasn’t made it into online slang dictionaries SFAIAA, but I’m sure I didn’t invent it.
As far as making up slang, well, my friends and I are all about changing the language one strange expression at a time. Among our greatest hits:
“[Her/my] squirrel’s asleep” - The female in question is having her menses, and therefore unfit to have sex with (unless you like it like that).
“Robbing the shed” or “having one’s shed robbed” - engaging in anal sex.
“Knockin’ the squash” - Indulging in any kind of sex act with a partner.
“Smackin’ the fat” - Sort of like knockin’ the squash, but without a partner.
Our dream is that one day these expressions will be used in a rap song. Then, and only then, will our lives be complete.