gack

verb: to choke under pressure.

He would have taken the lead, but gacked on a 2-foot putt.

by R. Snot August 29, 2003

gacker

Gacker (n): Someone who plays the game of genetics using both zinc fingers and stem cells.

John, the gacker, did the devil's work juggling them stem cells.

by forkrul assail June 14, 2010

Gacktacular

A feeling of something immensly pleasurable, often as a result of slipping one into your mates milf-of-a-mothers snatch.

"Show me your wound Mrs Pattni, its Gacktastically Gacktacular." Mr Budniak exclaimed.

by Bud September 25, 2004

gack

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 7, 2003

Gack

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

gack

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 December 28, 2005

gacking off

when a guy jacks off without showering for a couple of days (2 OR MORE).

BOB: today i was gacking off

by chivorey March 26, 2009