The term was popularised by London rapper Tempa-T, with his song 'Next Hype'.
It is possible that Par is a derivative of the term Faux Pas, which in french literally means a 'False Step' against the established norm.
Ricky: Yo gal you lookin kinda nice tonight, mind if i get you a drink?
Girl: Errr...get out of my face, don't talk to me. I think you need some aquafresh as well, cos your breath is kickin! Dem trainers aint real either.
Ricky's mate: Ricky Bruv, you just got parred.
Ricky: Eh Mum! What you cookin' tonight? Smells taaassty!!!
Ricky: Mum...Mum?! Ah allow it.
Ricky's mate: Ricky bruv, you just got parred, by your own mum.
Tempa-T: I SAY GET OUT DA CAR!
Ricky: Ah allow it..
Ricky's mate: Par.
Ricky's mum: Ricky, go shops and get me a coke and some skittles. Maybe some skips as well. Fuck it, i'll right you a list.
Ricky: Where is it?
Ricky's mum: 'Bout half hour away, if you hop on a bus.
Ricky: Mum, i aint got money for the bus.
Ricky's mum: Walk then.
Ricky: Ah allow it, thats long
Ricky's mate: Ricky Bruv, you keep gettin' parred.