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1. a conjunction of the words Fud and halfwit (or hawfwit in Scotland).
2. A fudwit is a term used to describe a person who is stupid in a dimwitted or annoying manner! Used as a pejorative to describe someone who has just done something stupid, often in situations where they've either been impulsive or it was blindingly obvious beforehand that it was a stupid thing to do. It can also be used to describe someone who irritates everyone because they try to impress everyone all the time & invariably talk a load of pish..
3. Scottish slang
That guy in the garage is a fudwit......
by Ceridwen April 02, 2013