Sterf maar stelletje kutsloebers.

If anyone understands this please tell me, I can't figure it out.

I understand.

It's dutch for : "Die, you bunch of .. eh, well... something rude, literaly "pig..something" "

Free translation, "Die *******s"

Why ? Did anyone say this to you ? Although I think it's the translation of one of the phrases from Kagain. "Die, you pigsqueeks, or something like that
:)