A term for getting drunk. Generally a term used by under 18s who think they're cool on facebook. Photos are taken at the event, in which the teens are holding large cans of energy drinks, carefully positioned to look like a can of beer.
Person 1: we better stock up on red bull for our piss up, so we can look cool on facebook
Person 2: good idea, make sure you turn round the cans in the photos so it looks like we're actually getting drunk