In the UK there are a lot of insulting words which end in -er, like this: scrubber (slut), tosser (masturbator), chancer (untrustworthy person), poofter (homosexual), wanker (masturbator, generally despicable person), nutter (insane), poser (affected/overdressed person). I think it’s a relatively modern British phenomenon because it seems like American English doesn't have all these -er insults. Can anyone give any insight into this?
(p.s. I am creating a plural tag "insults" since plural is winning votes over at meta.english.stackexchange.com; please give your vote on whether tags should be plural or singular.)