tomboyant
A word used to describe a brawny chick (often a lesbian) who displays masculine characteristics. It stems from the use of the word "flamboyant" to describe a male (often gay) who displays feminine characteristics.
Dude, my buddy last night got so drunk that he made out with this tomboyant chick just before he was out cold. You should have seen her, she had more beef on her than a cattle ranch.