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1.
Something fucked up.
"Man, his wife left him for his brother. That is gatch!"

"He got in a fight, now his face is messed up gatch!"
by Me Ahna July 06, 2005
 
2.
"gatch" is Irish slang for "way of walking".

it can also be used to denote the actual act of walking
-----------------------------------------
{way of walking}
dave - " check out the gatch on that guy "
kevin - " what a dope "
------------------------------------------
{walking}
John was gatching his way down the road
(or)
John gatched to the shop
(or)
" c'mon bitch, lets gatch to the party "
by Emperor Bubba April 19, 2005
 
3.
crazy, ridiculous, unbelievable

see also whack
"You got fired for no reason?, Dude thats gatch!"
by miket December 09, 2002
 
4.
Feminine version of the word "gooch". The skin between the vagina and anal opening.
She's a bitch. I'm gonna kick her in the gatch.
by Shakey Shakerton June 20, 2009
 
5.
Small triangular opening in crotch area of females while standing straight legged.
Damn, that's a nice ass. Ya, and check out the gatch!
by Snoop March 10, 2003
 
6.
To show off or brag; a person who does such things.
"Quit gatching, ass hole!"
"Brad is such a gatch, always trying to act cool in front of Janet."
by Anonymous January 09, 2003
 
7.
1. To brag or show off.
2. Someone who has a habit of bragging or showing off.
"Quit gatching, ass hole!"
"That Brad is such a gatch, always trying to act cool in front of Janet."
by Anonymous January 13, 2003