1. A swollen, bloody vagina; typically on a pet in heat.
2. A female partner's mood during menses.
1. Since my bitch went into heat, she's been rubbing her gunch all over everything.
2. Don't mind her, she's been acting like a gunch because it's her time of the month.
Abbreviated form of Goon Punch. A highly alcoholic concoction of goon (extremely cheap cask wine), vodka and juice/soft drink. Usually made in large quantities in a tub or similar.
"That gunch is deadly!"
"Get me some gunch would you?"
"This gunch needs moregoon"