barf(noun, verb) noun1. the matter ejected in vomitingSimilar word(s): puke, vomit, vomitusDefinition categories: substance, excrement, excreta, excretion verb1. eject the contents of the stomach through the mouthSimilar word(s): cast, cat, chuck, disgorge, honk, puke, purge, regorge, regurgitate, retch, sick, spew, spue, upchuck, vomitDefinition categories: body, egest, eliminate, excrete, pass