A fork of Rural Dictionary
A name given to people who are extremely energetic and also randy: A Massivley Energetic Randy Person!
Girlfriend's Friend: Why's your boyfriend running around the garden with a boner?
Girlfriend: We didn't have sex last night, so he's a MERP
Girlfirend's Friend: Ahhh I see
Girlfriend: After he's run around for a bit, i'll give him some lube and he'll be fixed after a few minutes in the bathroom.