A flirtatious gesture, generally used as a silent way to ask the second party if they "wanna fuck?" Not to be confused with the same gesture meaning "fuck you!"
All it took to get lucky, was "blowing smoke in someones face". And her smile was the only answer he needed.
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