have a monk on

== English == === Etymology === (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) === Verb === have a monk on (third-person singular simple present has a monk on, present participle having a monk on, simple past and past participle had a monk on) (UK, slang) To be sullen or bad-tempered. ==== References ==== 2006, Eric Partridge, Tom Dalzell, Terry Victor, The New Partridge Dictionary of Slang and Unconventional English