Mrs. Bates

A woman who, when seen from behind, is very attractive. However, when she turns around, she's very unattractive.

Damn, check her out, her ass is AMAZING, this woman is hot! (woman turns around) Oh shit, she's a Mrs. Bates!

Mr. Bates

when you ask for "Master Bates" on the phone at a bar/restaurant, the dude will go around asking where "Masturbates" is.

Is Mr. Bates at this table?