Gack

To get messed up in the process of putting the team on your back and still going out like a champ.

His night would have been better if he hadn't Gacked after the race.

by bww13 December 6, 2010

Gack

Gack is not a word but an emotion of pain and joy. And also a good word to say after dabbing on the haters

I have severe autism, gack

by Joebo kenysville February 19, 2019

gacking

Throwing up vigorously and loudly. It's worse than yacking.

Upon learning that she could get pregnant by swallowing sperm, she began instantly gacking on her new shoes.

by RBV and Ice February 4, 2016

Gack

In certain social groups, it's come to mean "to kill violenty". Typically by means of strangulation. It can also mean being shot from time to time but the latter is it's more common use. Either way, to be 'gacked' means to be killed violently and or by surprise. But strangely, is almost always used in jest or a playful nature.

"im gonna gack you, if you keep fucking around with me." (Non-serious tone)

by WeeLilFaggot February 27, 2020

Gack

Used to describe female pyhsique. Particularly her stomach and breasts. When a female's stomach sticks out further then her breasts. aka (When her gut sticks out further then her rack)

She's got a Gack
When her gut sticks out further then her rack.

by Rob K July 24, 2006

Gack

When you fuck your bitch so hard that her pussy makes a farting sound much like the nickelodeon puddy like material "gack"

Yo dude, last night I gacked the shit out of ashley's pussy.

by ScuryJerry January 16, 2006

gacked

contraction of gobsmacked

I was totally gacked when I saw that pround was a real word.

by Cythere March 3, 2008