Gack

The sound made by an individual who is in the process of sucking dick. Typically a gagging sound made from the throat.

Brenda gacks on that niggas dick because she has a terrible gag reflex.

That chicken head is always gacking choad in the park.

by Catsleeze September 24, 2013

Gack

Dick, in particular an erection.

Billy whacked his gack in class the other day, and I could never see him the same way again.

by El ritardo June 24, 2018

Gack

The first retching sound a cat makes when it hacks up a hairball.

I heard Morris gack after giving himself a tongue bath.

by the_great_waldo October 22, 2009

Gack

Uranium by product and gouda cheese mixed together to create the one and only gack. Gack has the ability to be a tasty afternoon snack or can also perform shit rockets. shit rockets will expel chunky poo from your bum at speeds exceeding 200 mph, it will, rip your rectum in half.

WOW! I ate gack last night! and it blew my ass in half!

by goo goo the magical elf November 11, 2010

Gack

When your girl...or guy(it is 2017)...gags on your dick

I don't care that Kaia is his girlfriend. Imma gack Dylan tonight at 12:04.

by UpNextVanillaSwirlOnThePole March 09, 2017

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 06, 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