Radish

(verb) In a rest-room, to engage a man in conversation between urinal and wash-basin. Not to be confused with 'Rhubarb' - the more serious offence of actually speaking to someone whilst they are urinating.

'Pip, I think I've left my walle-
'Not while I'm pissing Dave. You can Radish me in a sec...'

by Rev. Tremendous Embakwame June 13, 2008