ginch noun4 •(slang) Underwear, especially men's briefs.She stowed the ginch she had just received as a gift in the dresser out of harm's way. — 2000 •(slang, vulgar) vagina, pussy.She probably up there getting her ginch plowed right this minute by some drummer out of Richmond. — 1977 •(offensive) A woman, viewed as a potential or actual sexual partner.What reason would he have to try it, even, except to show off for this ginch? — 2014 •(offensive) An effeminate man. formsginches