Dating Myself 

To make oneself appear to be dated, or older. Commonly interpreted as making yourself seem out of date, old, or aged.

"I know I'm dating myself here, but I was in Three Smile Island."

-Quagmire

Dating Myself by Chosen Sloth October 12, 2009

dating myself 

Masturbate. Or having sex with yourself.

My girl friend left so I am dating myself tonight.

dating myself by Avery B September 21, 2005