pretty much what it sounds like. but in case you can't tell, it is a string of words you would use when you are running out of insults, or just for shits and giggles.
A phrase only currently used by two people on planet Earth. It’s a combination of “fuck off, cunt,” “shut the fuck up, cunt,” and “you’re a fuck up, cunt.” It has more meanings and uses, but the true nature of the phrase is only known by the originator.