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"
Badly pulling or pushing a putt inside of four feet. Generally caused by nerves or pressure. May also be caused by alcohol or drug withdraw, arthritis or old age. Commonly a result of having the "shakes".