Nutter (and only Nutter!)
The origin of this slang word is the TV Ad for Dime Bars (now Daim, made by Kraft Foods), a chocolate covered crunchy caramel candy bar, which aired back in 1995.
The Ad featured the British comedian Harry Enfield playing a slobbering retard in a supermarket, filling a shopping trolley FULL of dime bars... he's approached by a well spoken interviewer (Also Harry Enfield), who asks him 'Do you remember your first Dime?'... anyway, the ad finished with the retard exclaiming to his wife:
"That bloke's a nutter... OI, NUTTER!"
Google the phrase 'dime - that blokes a nutter' and you'll be sure to find many videos of this wonderful ad
Many of us will also remember the Armadillos from the second ad they did!
He's a bit of a dime bar...
Oi, Dime Bar!
Lookout! Dime Bar alert! (nutter approaching)
"richard you dime bar"
(to the person who wrote the first definition-steve dave- either you are a mallrats fan or have a class name which is it?)
That bloke with the open mouth and saliva making its way to his lapel. He's a right fuckin' Dime Bar he is.