quaff UK /kwɒf/US /kwɑf/noun 1verb 1forms 5 noun1 •The act of quaffing; a deep draught. verb1 •To drink or imbibe with vigour or relish; to drink copiously; to swallow in large draughts.I can't believe you quaffed four pints of beer and could still drive! formsquaffed · quaffing · quaffeth · quaffs · quaffest