What's your favorite swear word/insult?

[abaris]

In Papiamento (spoken in Aruba) they say "Bai den conjo di bo mama!", which translates as: "Go back up your mama's cunt".

I do like the implications of that. Go back where you originally came from.

We have a similar one which takes things one step further: "Du ghörst zruckpudert und abtrieben", which means, "go back to your mama's cunt to to be aborted".