Any person who, seeing a chav (usu. on the Internets), thinks it's the trendiest thing ever and wants to be just like that. Literally, a portmanteau of "chav" and "wannabe". Most common in areas outside UK, and in people with quite a bit of money. Most easily identified by inappropriate dress (esp. wearing *actual* Burberry), foreign accents (also fakeBritish accents), and/or worldwide notoriety.
Note: can also apply to such things as dogs, children, video game characters, and rocks.
"Oi, you sass that chavvabe David Beckham?"
"Dude, you're not British."
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi