MIFF Meaning of MIFF in English v. & n. colloq. --v.tr. (usu. in passive) put out of humour; offend. --n. 1. a petty quarrel. 2 a huff. Etymology: perh. imit.: cf. G muff, exclam. of disgust Oxford English vocab. Оксфордский английский словарь. 2012