Gak 

Something that was done by ones self, not influenced by any outside party, that was fucking crap. Therefore, being an insult against ones self.

Matt: What kind of fucking shitty job did you do there you fuckin' douche bag?

Chris: Yeah man, that was fuckin' gak!

Gak by Steeman April 30, 2005

GAK 

Generic Asian Kid
- someone who isn't down or lame

"That guy is such a GAK. He left the party early to go watch Spongebob"

GAK by Calvinisagak December 30, 2014

Gak 

Generic Asian Kid. An Asian kid that wears hollister and aerospastle

Gak

Gak by thereveletaionspeaks September 23, 2015

Gak 

Usually means “shit” or “bad”. Common in northen ireland smick talk.

“This partys gak”

“I hate school, its fuckin gak”

Gak by Beckfast November 21, 2017

gak 

What you say in the middle of winter in Vancouver when you open yr front door and it’s gray, very cold and raining hard as fuck.

(Unlock door) look out and see shit weather and say GAK!!

gak by 9 inch Jack. November 22, 2017

Gak 

To consume drugs, usually MDMA and marijuana, in a house setting.

“Man, I can barely remember that gak last weekend I was beaming so hard”

Gak by IcrywhenImasturbate July 29, 2018

Gak 

Green Shit

EyO mAyO wAnT sOmE gAk

Gak by Oggoi November 30, 2018