Quietpes in playing the computer game Pro Evolution Soccer on the XBox very quietly, so as not to wake your housemates. Or at least creating the illusion that you are playing Pro Evo quietly, whilst parting like a man possesed.
Housemate 1: I'm not being funny mate but you kept me up all night again with your bloody parting mate. Mate.
Housemate 2: No, no, no we couldn't have, I just had a few mates round for a bit of quietpes. Oh, by the way, they'l be more quietpes tonight aswel, I'm off to the pub to get poombed