In another thread I asked for examples of “hip” phrases to (mis)use to drive my teenagers wild. Wondered if folks would like to share any particular catchphrases - either current or out-of-date - that have a regular place in your vocab.
Personally, I have long realized that I use the word “cool” far more frequently and in far more capacities than most folks of any age.
Groovy.
I know. I’m an embarassement. My son informed me of this last night. And thanks to your other thread, I was ok with that! 
Humiliatingly enough, I can’t seem to expunge “Dude!” from my vocabulary. I use it way, way too much, and I don’t even notice it. People make fun of me.
Bomb. Boss. Dudeman. Chillax.
“Awesome” and “cool”, which seem to have stood the test of time over the generations, are permanent components of my vernacular. At the other end of the scale, “lame” is my common word. I’ve also taken to saying “limp” in hopes that it may catch on. “Man, that is soooo limp!”
From my girlfriend I picked up “gang” as a term denoting a large number or amount, she in turn picked it up from her students (she’s an SAT counselor)
“We got a gang of food at the chinese place.”
“There were a gang of fruitflies in the kitchen.”
Awesome. Cool. Dude. Bogus. Bummer.
Cool. Dude. Bummer. Awesome. Sucks. All are pretty timeless.
On the other hand, "Bitchin’ " pegs me as having been in High School in the late 70s/early 80s.
Fortunately I’ve successfully dropped “Make butt” and “radical” (too dated) and “That’s so gay” (un-PC)
What does “make butt” mean?
I say “right on” way too much. One time I got a fake award of a right angle measuring thingy from a group I was working with because my answer to any request was “right on.”
I also say dude all the time, and sucks.
I second using “groovy”.
Sometimes I say 'Groovy, homes."
“Groovy” is a term that is 40 years old. It only works when you say it to teenie-wankers and people in their clueless twenties.
Awesome. (so often, it bugs even me)
Coolio (replaces “cool”)
Kool and the Gang (same)
Peace in the Middle East (said in parting)
and from these boards…Suxxors (not often, though. I’m trying to control myself.)
I really like the recently-developed term “24/7”. It’s very useful and descriptive.
“Word.” I started saying it as an ironic joke, and it has insidiously crept into my regular vocabulary.
MaxTheVool, I’m not sure if you’re serious about the term “24/7” being recently developed, but I remember hearing it at least fifteen years ago.
But if you’re joking, just pretend I didn’t say that.
24/7/365, on the other hand, grates.
I am dismayed by the reversal in meaning of “sick”. How do I describe a truly hideous thing to these-kids-today without them thinking I’m depraved?
I use a modified version of Groovy; Groove. Back when I was (alledgedly) hip, whenever someone made a mistake, we always said “Oh, my bag.”
I do not know how “My Bad” came into being, but I still say “My Bag”.
I only use “Dude” when I talk to my son or my employer.
“De Dee De”, as made famous by the tragically unfunny Carlos Mencia, seems to have replaced “Well DUH” among the 19-22 year olds I work with. Other popular sayings among them: calling everybody “dork” or “retard”, and “what’s up chickenbutt".
I like to mock them by adding “and stuff” and/or “or whatever” to every conversation I grudgingly have to conduct with one of them. For example: “As soon as I get my project schedule ‘and stuff’ done, I’ll check on your TPS report or ‘whatever’. Yeah… I’m not really hip or cool.
This was around in the late 70s, at least in Southern California. It was a way of expressing disapproval of some thing or action. If someone did something stupid, embarassing, or otherwise uncool (“pulled a boner” to use a earlier slang term) you’d call them on it with a “Make butt, man!” In other words, “That’s stupid, don’t do it again, you’re embarassing me in front of the cool kids/hot chicks/whoever”. Alternately, it was used to razz someone who made a mistake. Your friend wipes out while trying to show off a new skateboard move, you’d laugh in his face with a loud “MAKE BUTT, DUDE!”.
If a movie/class assignment/other activity seemed lame or dorky, “this makes butt”.
Word.
And I dunno if it counts as slang, but ‘‘Fuck yeah’’ is a regular part of my vocabulary.
So is ‘‘Fuck that shit.’’
I use the ‘‘F-word’’ a lot, come to think of it…
Divided by a common language, I guess. ‘Cool’ is the only one, unless I was in some 80s theme night.