Bat is an acronym for the term Bitch Ass Trick. Just listen to how the words roll of your tongue. Bitch Ass Trick. Bat is a shorter term to use when the user feels like denying themselves of such revelry when saying the term Bitch Ass Trick.
Damn, my ex-girlfriend is a bat.
It can also be used with other terms such as Stitch.
Damn, that Stitch, why does she always have to be a Bat about things.
The word bat refers to the fat that can be found anywhere on a back. A combination of back and fat, it is a term used for the pinchable fat of back. The best bat is usually found surrounding the shoulder blades or the lower back area covering the kidneys.
"Dude! you pinched my bat!"
"You have enough bat to feed the Salvation Army!"