B.M.T.B. (Baby Mama Type Bitch)
A former lover who acts like you're still married even though you never had a kid and she still thinks you're a piece of trash.
'You didn't even come to my kid's school play! You're a total dummy!'
'You didn't even help me with the kid! You're a total dud!'
'You didn't even buy me a cupcake! You're a total dud!'