Entry 2 senses Webster, 1913 guff · IPA /ɡʌf/ 01 n. A ludicrously false statment. 1. A ludicrously false statment. 2. Insolent or disrespectful talk; as, don't give me any of your guff, young lady. Syn. bullshit, bull, Irish bull, horseshit, shit, crap, bunk, bunkum, buncombe, rot, hogwash, dogshit.