A bitch ass is someone who is a shit-talker and a coward at the same time. They often wait till your back is turned to talk mad shit.
"You see that girl over there? Yeah, I heard her Bitch ass was talking a lot of shit."
A pussy who will make other people do funny and stupid shit. However, when anyone asks them to do something funny and stupid, they pussy out.
Soren, "I just fought Tiger and he's 20 pounds more then me, so Tiger fight Tyler."
Tiger, "I aint doing that he's twenty pounds more then me."
Anthony, "Tiger, you a bitch-ass."
Logan is the definition of a bitchass
Bitch Ass wow Logan is such a Bitch Ass