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27.
Gak
To spurt, shoot and or secret semen from the penis. As made popular by Nickleodeon's show Double Dare.
Oh, look at that, you got gak all over your mom. Good job!
by JayMoore November 17, 2010
 
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.
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!
by Penis Pal May 17, 2008
 
7.
1) Usually a form of displeasure, as if someone were to yoink the last chip and leave you with nothing

2) The funny sound people make RIGHT before vomiting.

(1a) "Gak! That's my chip bitch!"

(2a) "Oh man... GAK! (hurk)"
by Zhunter March 14, 2007