A southern term used to describe a girl or woman who is the absolute shiz. As part of this shiz-ness, she is able to perform traditionally masculine tasks in such a way that renders her not butch but rather cool. She can be one of the boys and she can be a girly-girlprincess, depending on her mood. This girl gets shit done. Needless to say, it is complimentary.
Dude, look at her chug beer. The girl's a hoss.
Woah, Sheila got the entire board to change their policy and vote her way. What a hoss!