look up any word, like oprah dollars:
1. Having sexual intercourse with an extremely old woman.

2. Nasty dirty old person sex.

Mitch: Omg dude. That chick you had sex with is like 53!

Derrick: Is that wrong.

Mitch: Yes... Granny dipping is wrong...
by I_AM_THE_CLIT_COMMANDER February 15, 2008