Gack 

The noise that animate objects make when you sharply grab their neck. Most commonly found in birds and humans.

Father: Go ahead and grab it son.
Son: Ok.
Little Boy: gaaacck
Son: Haha! This is fun.
Little Boy: *gasp* aack gaaah!

Gack by Psionics November 17, 2004

gack 

food that sticks to the roof of your mouth, also the process of food getting stickier the more you chew it

"this food is really gacky"

gack by James 26 December 28, 2005

gack 

A man or women's discharge I.E. His or her cum.

I gacked all over her.Or she gacked in my mouth...

gack by cath boys June 29, 2006

Gack 

derogatory term for cunt

Get your Gack out!

My Gack smells fishey

Gack by Jacko September 23, 2004

gack 

Very good marijuana bud. A superior strain of cannibus that has been found on display at the cannibus cup at least twice.

I got the GACK y0. y0y0 I'll give you 5 oz. of this gack I just got from vantown for a grand and a blowjob from your gf.

gack by Seattle (Big A) May 1, 2005

Gack 

a name for a sexual organ, usually the female one.

oh man wouldnt mind of bit of that gack!

Gack by maddawg 101 March 25, 2009

gack 

expression used when a hockey player does something significant while playing in a hockey game

GACK! <insert french canadian or eastern european name here> just scored!

gack by JesusOfNazareth March 6, 2004