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 girl or boy that loves attention and is a jackass... Typically A hypocrite
:Omg Chia’s being such a bitch ass today
: he’s a bitch ass everyday