the literal translation is:
ur mum's punany!!!! but it means u want to have a wild ride with the mum in question.
its then one of the shortest way to start a nice discussion with an arab guy , discussion that will probably ended with a direct fist in the midle of ur face as the
transcription of all the love involved between u and the persone ur talkin to . of course as all insults u can combine it in may ways