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8.
gak
A word used in central Scotland (Perth and Kinross, Fife, Stirlingshire) to describe an unsociable and annoying person. Synonymous with 'dick' or 'twat'.
Person A - "You know that John guy?"
Person B - "Aw yeah he's an actual gak, he needs hit."
by Your Maw's Maw December 22, 2012
 
9.
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
 
10.
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
 
11.
Gak
Gone Away Knocked. The point you reach when you are so drunk yuu are no longer sociable or aware of whats going on. Super smashed on drugs or alcohol, and you probally wont remember the nights events the next morning. You are Gak'd.
Yu drink way to much, and do some drugs, crossfadded to the max you are Gak. You are gone away knocked past the point of no return.!
by LazieKay February 17, 2012
 
12.
Gak
To take or steal from an unsuspecting person or store.
I done gak'd his shit!!
by Stop The Insanity September 15, 2011
 
13.
Gak
Epic acronym for "Good as keent" - derived from the word cunt. Used in casual conversatiom to emphise the level of one's coolness. being called a "Gak" (said as it is written) could quite possibly be the biggest, highly ranked compliment given by a mate. Used generally between guys - a way of showing their affection for another bro without sounding pussy; Gak coming from a chick is even more complimentary because any chick that knows and uses the word Gak must be a Gak herself.
Guy 1: Bro, (insert name here) seems pretty chill ae?

Guy 2: bro hes a gak

Guy 1: yeah seemed like a gak

Guy 2: yeah man, gak as.

all the other guys in the room agree that (insert name he) is DEFFINATELY a gak
by chillgak December 20, 2010
 
14.
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.
by China White April 02, 2003