A male who possesses an extremely "sexy" female body without a sex change. They have large nipples, a big ass, and a small penis(all of which are unfortunate to have if you are a male).
Jefferey: Man she is super hot, imma get her number.
Gordon: Dude that's my homeboy Lamaar, he's a thickmale.
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