how about "twmffat twp" ? (totally stupid idiot)Eejit!!
or a root in a brothel..My most used one is as it's always true
cunt couldn't organise a pissup in a brewery
Filthy mackum cunt?First one that springs to mind is vapid dickhead.
Fuck off, cuntychops.
Misguided arsehole.
Shit for brains.
Greasy twat.
Depends on the situation, really.