Casket-Robber 

When somone dates another person who is older then they are.

Friend: Dude how is your girlfriend? Aren't you only 18?
Guy: Yeah, she's 21!!
Friend: Dude your a fucking Casket-Robber

Casket-Robber by CabaltheWolf June 17, 2007

Casket Robber 

When a man dates a woman that is way older than a cougar or milf. Casket Robber is the antonym for Cradle Robber.

A 23 year old man trying to get in the pants of a 65 year old woman.

Yo Damn, Doug! That lady is old enough to be your grandma! Quit trying to be a damned Casket Robber! Sicko..

Casket Robber by MagicManMike December 31, 2009