gwack 

On the show Torchwood, the relationship between the characters Gwen Cooper and Captain Jack Harkness is known as Gwack(in the style of 'ship names like Spuffy).

This relationship is terrible. seriously, it's so badly conceived. It just doesn't work. Therefore gwack can be used as to describe anything terrible.

It's also a great onomatopoeia for vomiting. Honestly - Gwaaaaaaaaaaaaack. Which Gwack makes people want to do.

"What a pile of gwack"

"Seriously, I'm going to gwack"

"Gwack make me want to gwack"

gwack by Cuilean March 30, 2008

gwack 

When a boy cheats on his girlfriend by cuming in another girls butthole.

He gwacked in her butthole.

gwack by tracy April 14, 2004

Gwack 

A pairing from the show Torchwood, with the characters Gwen Cooper and Captain Jack Harkness.
It is one of the canon pairing in the series alongside Janto and Towen. (I anto Jone x Jack Harkness & Owen Harper and Toshiko Sato)
Many fans ship this pairing, but since Janto has gone canon, many have supported Janto instead.

Gwack is a canon pairing from Torchwood.

Gwack by AnetteVee March 21, 2009

gwack 

a combination of gay and wack

That show I just saw was gwack as hell.

gwack by lyssafacee November 10, 2008

gwack 

A middle name given to a guy named Kevin, from a guy named Justin.

Kevin Gwack Nguyen has a stupid crippled foot, and he walks slow. But, he`s cool and we love him.

gwack by amandarose September 9, 2006

Gwack em' 

slang term when playing basketball.

*shoots ball* gwack em'!!

Gwack em' by Pete April 2, 2003

Gwack 2.0 

gwack is another name for giving head better known as a BJ aka Blow Job

this name is taken from the sound you make when you deep throat and your gag reflexes go off "gwaaaaaaaaacckkk"

"Gwack 2.0 " is giving/recieveing head by/from a sexual partner
I was at this party last week and this hun offered me "Gwack", she went down on me hard
My girlfriend prefers to swallow when she gives me "Gwack"

Gwack 2.0 by Micca Cummings June 10, 2023