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15.
Gak
A word used, when no other explanation of how one feels can be explained in certain situations.
Jessica: "Don't even worry about it."
Me : "gak"
by Snagless March 23, 2012
 
1.
gak
Speed, meth, twick, crank, methamphetamine, Desoxyephedrine.
Ack! we're out of gak.
by Gakster October 22, 2003
 
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.
by Dameon Jackson January 17, 2005
 
3.
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 November 19, 2003
 
4.
Gak
popular slang word for coke or blow.
Man, let's go line up a couple of phatty gakkers bro.
by SlipStream May 17, 2003
 
5.
Gak
The Bronie's kryptonite.
"GAKGAKGAK"
by BronyPony November 30, 2012
 
6.
A person that hates complainers.
I was bitching, then that Gaks told me to shut up.
by The One You Love to Hate July 10, 2009
 
7.
Gak
Used as a verb, this term describes the swallowing of something unpleasant or objectionable.
She gave really great head, but when I came, she had a hard time gakking down my cum load. It really surprised me.
by The Loadmaster July 09, 2013