geriachick 

An attractive female who is too old - generally above 50 - to be considered a cougar.

Guy1: Check out the smokin geriachick yonder.
Guy2: Dude,that's my grandma!
Guy2: Hi grandma!
Guy1: Your grandma is hot.

geriachick by o0oo January 12, 2008

Geriatdick 

Old man cock.

That old dude is doing well with that drunk girl. She's going be be getting some geriatdick tonight!

Geriatdick by Sir To You August 15, 2023