Why don't you bend yo ass over and we're gonna see who the real bitch is
An expression that a dominant person says to a weak person; especially when it comes to a challenge. The expression was actually more of an insult than an intended joke made toward another person.
The expression "Why don't you bend yo ass over and we're gonna see who the real bitch is" was used by a very dominant person or a bully to insult a weaker person.