Shitweasel?
“I’d call you a cunt, but you lack the depth or the ability to give pleasure” - Jimmy Carr
We used to call Scots, FRISP.
Its not offensive, until you understand the acronym
F****** Ignorant Scotch Pig
They seem to get annoyed when they understand it. You absolutely must use the word ‘Scotch’, and not the word ‘Scot’ or it will not be quite offensive enough - ask any Scot why.
As a personal insult, call any English person a Kiddie fiddler and see what happens, it will probably hurt when you regain consciousness.
Where’s the “r” come from?
Pirates.
^:D
Anyway, what’s the matter with “pigfucker”?!
muthafucker
I think today it’s just another curse word. But not when it was first coined. Serious fights could start over that word. You could loose a few teeth calling somebody a mf.
It took me a couple of seconds to get that. 
R= Repulsive
Hence F****** Repulsive Ignorant Scotch Pig, yes, its much better now
Anti-sementic insults are pretty strong here in the UK.
‘Wank stain’, for example…