guff /ɡʌf/noun 4verb 2forms 3phrases 1 noun4 •(informal) Nonsensical talk or thinking.“… That woman is stark mad, Lord Stranleigh.[…]If she had her way, she’d ruin the company inside a year with her hare-brained schemes — 1913 •(informal) Superfluous information. •(informal) Insolent or otherwise unacceptable remarks. •(slang) A fart; act of breaking wind. verb2 •(slang) To fart. •(slang) To mislead. formsguffed · guffing · guffs Phrases with guff guff offTo waste time; to shirk at work.