Backdoor Betty 

A girl that enjoys anal sex, sometimes even over vaginal sex. This is usually a secret preference, and not advertised by the girl, to avoid jokes and to protect her "reputation" as a "nice" girl.

She'll never admit it, but I've heard that she's a Backdoor Betty!

Backdoor Betty by TheMaskedMarvel February 1, 2010

Backdoor Betty 

A slut who takes it in the poop chute often!

damn that backdoor Betty sure loves it in the arse!

Backdoor Betty by opotimus April 22, 2006

back door betty 

The best type of girl.

All good girls take it up the arse. If she's not a backdoor betty she's no lady.

back door betty by The big G March 23, 2004

back door betty 

A woman who likes to take it in the ass.

Mike's girlfriend is a back door betty.

back door betty by TAC April 28, 2003

Back Door Betty 

A beautiful woman who enjoys anal penetration during sex

"Do you know that girl?"
"Nah, but i wish i did, Beno used to go out with her and he reckons she's a Back Door Betty."

Back Door Betty by bdbetty December 2, 2015