a term used for people who think they are hot shit. someone who thinks what they did is significant, by really no one gives a fuck. The phrase must be said with sarcasm or it loses it's insulting meaning.
Laquetta: oh my god Rolanda I just found a penny on the ground!
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