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1.
Underwear. Usually, but not always, standard men's briefs (tightey-whiteys or y-fronts). Often connotes particularly old, worn-out, dirty, or generally nasty items. Variations include gonch, gaunch, gawnch, or gonchies. Primarily Canadian usage.
"You think that it's a cinch / to get up in my ginch?" -- Peaches, "The Inch"
by anonymous September 03, 2004
 
2.
according to the porn industry ginch is a whore of low repute; a slag
If janice dickenson wasn't famous she would be the biggest ginch in whoredom
by adambalder September 16, 2007
 
3.
pussy. typically nasty biker pussy
by Anonymous July 09, 2003
 
4.
Ginch is an adjective. If someone were to be Ginch, they would have to be pretty awesome and somewhat cool. Typically used to describe how impressive someone is.
Man, do you see Matt hitting that half pipe? Man he's handling that like a boss. Matt is actually so Ginch.
by HugeAsshole May 08, 2014
 
5.
Ginch is the area measured lengthwise between a man's ball sack and anus.
James: Bro my ginch is so sore from last night

Dev: I told you not to let her pinch your ginch

James: she couldn't resist, I showed her my 7 inch ginch
by DoctorJizz January 26, 2014
 
6.
Street, gang and surfers' term of an attractive female, especially one regarded as a sexual object or target
- Do you want Tommy (the dog) in or out ?
- Leave him out ! He's chasin' that Calico ginch
from the track houses again !
by sidekickbottom July 08, 2010
 
7.
girth inch, the length of the circumference of a penis
"Dude, I couldn't bottom last night--that guy had mad ginches."
by jello84 April 23, 2010