Shit, fuck/fucking, bitch, cunt, bastard, faggot, pussy, dick - seriously.
I'm also forever calling people 'doughballs', and while I don't really know why I say this shit, it appears to allow me to call people dumb/stupid/thick/slow without them taking offence.
Most common sentences;
1. 'Whit the fuck ye' tockin' aboot?' (What the fuck are you talking about?)
2. 'Ya fuckin' doughball' (You fucking doughball)
(No typing errors)