Chunwit
An idiot; a useless person, spec. one who produces too much saliva; a dribbler, a chucklehead. Speculation that this word is a neologism first used by Samuel Beckett is entirely unfounded.
"Sharon thinks I'm a chunwit ever since I sold her 'E' rege Nissan Cherry on E-bay - accidentally by the by - for eighty squidneys."