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1. gak
Speed, meth, twick, crank, methamphetamine, Desoxyephedrine.
Ack! we're out of gak.
by Gakster Oct 22, 2003 share this add a video
2. gak
A popular Nickolodeon slime, available in many variations such as glow in the dark, speckled, cocoanut smelling, etc. Useful for making fart noises, grossing out friends or as sexual lubricant.
Sweetie, we ran out of KY gelly, go get some of your step daughter's Gak.
3. Gak
popular slang word for coke or blow.
Man, let's go line up a couple of phatty gakkers bro.
4. Gak
slang for cocaine - from the nauseating effects of doing too much, causing retching after a hefty snort.
man, that gak last night was cut, I was nearly blowing chunks.
5. Gak
A old guy who plays a gum leaf to attract children to his white ford falcon to rob them of their childhood!
Backs to the WALL!
Gak's on the PRAWL!
6. gak
Means 'Generelle Abkürzung' (General Abbreviation) in German and can therefore be used for literally EVERYTHING.
-I LOVE you!
-gak?
~~
-gak gak gak?
-gak!
-gaaaaaaak?
-gak gak!! (gak...)
~~
-Hello!
-gak
by Luca Nov 19, 2003 share this add a video
7. GAK
One who does things for no apparent reason, without understanding their situation.

A formal greeting among friends

Someone who has what we call "Sugar tourettes", on a sugar high and says things at random
Friend -Hey jeff i heard you were planning on studying later with jamey right?
Jeff- GAK!

Hey jeff whats up? GAK!

Hey jamesy poo, i got you a valentines day present. GAK! SHAMAGALA