To make fun of, pester and annoy those around you. Normally through the childish use of farts, alcohol hand rub, reckless driving, strategic microwaving, corridor warrioring, belming, silly noises and SDing.
Matt to Joe: "Shh but I have just put a load of handrub on the stairs"
Paul: "You BASTARDS, how many times must I constantly fall for this!! I bet someone has been howelling."