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25.
gak
1) A popular Ardamian word describing certain gooey substances such as slime or bodily fluids except urine and blood.

2) Breathable ~. An Ardamian reference to the chemical Perflubron, prior to the knowledge of its proper name. Also "The Gak".
1) Disgusting, this text book has gak all over it!

2) We can use the Gak to prevent our astronauts from getting crushed by g-forces in acceleration.
by Umshaad Trivates January 10, 2004
 
1.
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
 
2.
gak
Speed, meth, twick, crank, methamphetamine, Desoxyephedrine.
Ack! we're out of gak.
by Gakster October 22, 2003
 
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
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