prawn UK /pɹɔːn/US /pɹɒn/noun 4verb 1forms 3phrases 1 noun4 •A crustacean of the suborder Dendrobranchiata. •(Commonwealth) A crustacean, sometimes confused with shrimp. •(Australia, slang) A fool, an idiot.This is utter dribble. I've not read much worse than this in a long time - and he admits he doesn't know - "or so I am told". Get real, you prawn. — 1999 •(informal, offensive) Synonym of butterface: A woman with an attractive body but an unattractive face.She's a prawn! verb1 •To fish for prawns. formsprawned · prawning · prawns Phrases with prawn prawn cocktail offensivea strategy of the Labour Party in winning over important people in the world of finance