1. twonk - Noun
2. twonk - Verb
(Britain, slang, countable) A stupid person.
(Britain, slang, uncountable) Nonsense; rubbish.
What twonk you are talking!
twonk (third-person singular simple present twonks, present participle twonking, simple past and past participle twonked)
(transitive, Britain, slang) To hit or slap.