gack

A dark substance composed of melting snow, dirt, spilled beer, and a powerful mix of other excretions and spillings that stained SUNY @ Oswego students' shoes/boots after an evening imbibing at such places as Broadwell's and Buckland's (mid 80's through early 90's).

Doug: Yo, Dave, what the fuck is on your boots?

Dave: It's gack from Broadwell's last night.

by MoshKing88 March 10, 2023

gacked

to be fucked off acid

"oi conor"
"cunt im gacked"

by joeysmatekevin September 27, 2018

Gack

Something truly unhealthy yet shallowly rewarding.

Get some gack while you are at the shop: NikNaks, Starbars - all the major food groups.

by Old Moore's Balzac December 10, 2022

gack back

Used to describe back pain due to extensive slouching while using crystal meth and/or blow.

"Damn, my gack back is killing me."

by AnonymousTweaker August 23, 2021

Gack

Gack also spelled gach is a word to be used when something is gross unpleasant weird strange or nasty started being used in Ireland 2015 and has grown to a common word

It is a great word to add to your vocabulary

Gack

Ew that meat is gack

I saw jo pick his nose, ew that's fucking gack

That's one big spider that's so gack

Your such a gacky person

by Degreeinbruh September 1, 2017

Gack

A Synonym Of Back, Can Be Used In any Situation, However, Do Not Confuse This With The Adjective Gackful, Which Can Mean "Best, Great, Good"

"Man, Its so Democratically GACK"

by Myballsitchmore December 12, 2024

gack dancer

Someone so high on meth they move uncontrollably. This usually includes wildly exaggerated leg ,hip, arm and butt movement that often look like their moving to some unknown beat and looks like very much like the dance the Elaine character on Sinefeld does.

I can't be around her when she tweeks , she turns into a gack dancer moving all crazy like that.

by Kris burkholder June 8, 2017