gack

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

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

by cath boys June 29, 2006

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.

by Seattle (Big A) May 1, 2005

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!

by JesusOfNazareth March 6, 2004

gacked

to be gacked is to be under the influence of methamphetemine

as in "I was so gacked last night that I took apart my vcr and cleaned it now I can't gety it back together"

by jon thomas (chipper-shredder) January 25, 2005

gacked

extremely high and lacking in cooridnation skills or natural grace. Developing temorary speech impediment or just a low volume mumble.

"Too much amphedamines and three days of sleep deprivation has got me straight gacked yo."

by Heather j November 22, 2006

gacked

An individual who is heavily under the influence of MDMA (ecstasy, caps, pills, etc.) namely characterised by their dilated pupils and gurning jaw.

Why is Jack's clenching up so hard? He's gacked as

by hellohi21 January 18, 2020

Gacked

To be under the influnce of crack or cocaine.

Dude me and my friend bumped an 8-ball last night...we got so gacked.

by *k!nG Br@nDoN* March 8, 2005