29
to kill someone, something or some idea.
imma gack dat be-yotch!
by Nietzche July 01, 2003
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30
The unknown fluid or mass created as a result of decomposition.
Dude, you gotta bury that roadkill. That gack is starting to run down the hill.
by BrightApollo March 07, 2003
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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31
He would have taken the lead, but gacked on a 2-foot putt.
by R. Snot August 29, 2003
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32
The noise that animate objects make when you sharply grab their neck. Most commonly found in birds and humans.
Father: Go ahead and grab it son.
Son: Ok.
Little Boy: gaaacck
Son: Haha! This is fun.
Little Boy: *gasp* aack gaaah!
by Psionics November 17, 2004
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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33
food that sticks to the roof of your mouth, also the process of food getting stickier the more you chew it
"this food is really gacky"

by James 26 November 17, 2005
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34
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 28, 2006
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Golden Shower Plush

He's warmer than you think.

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35
Get your Gack out!

My Gack smells fishey
by Jacko September 23, 2004
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Golden Shower Plush

He's warmer than you think.

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