slaggy ass bitch is a really annoying girl who goes out with people just to get stuff for free
Jonathon is a slaggy ass bitch i know you think it is a boy name but it is not she is a girl
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."