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
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