Sex Traitor

You're with your best friend at say, a bar or club. Then, someone of the opposite sex comes along and all of a sudden, they're taking social potshots at you and in some way, shape, or form, making remarks that make you feel less than you really are.

Sex Traitorism refers to the act of putting someone down in the hopes that it will make you seem more desirable to the opposite sex. It is a shameful act that makes you seem insecure.