An act that groups of people do, and think it the greatest thing ever, for little to no explainable reason.
ie: Bitching about the government, using cute internet phrases, joining the latest trends or, conversly, making fun or bitching about the latest trends.
Suzie: My booty turns ghetto these mad cool pants i got at Tarjeh.
Jan: You wish miss butterfuck. Quit with the teenage sodomy before your spandex rips.