The inverse of chav. A schweffe can be spotted around town often wearing a tweed jacket and red trousers. Aka a hooray henry.
Gary: Did you just spot that nobber walk past wearing the Barbour jacket and wellies?
Dave: Yes mate, what a tool. He must be a schweffe.
Originally an English public school word with several meanings. For example, a guy who spends more time with his girlfriend than his mates or just a general idiot. But it has come to mean a public school idiot, since these people are the only ones who ever used the word.
Your mate Rupert isn't even on the guestlist, what a schweffe
Mate, I can't believe you're chilling with Antonia again this weekend, you're turning into such a schweffe
That guy Rollo who says 'schweffe' is a fucking schweffe