Ground Rule Double 

The scenario is such that you have a kiss and a promise from your old lady but you are not confident that she will deliver later on. So you have the forethought to masturbate in the morning so if it dosent work out with her later you don't become a testosterone filled mad man. So contrary to a double header which would require one to have sex twice in one day this would be considered a Ground rule double should she conced to sex later on.

Person1: Hey Keith I scored a Ground rule double yesterday.

Person 2: What the hell is that?

Person 1: You know it's when you rub one off in the morning and score with the old lady at bedtime.

Person 2: Oh yeah I did that last Sunday.

Ground Rule Double by Decals March 12, 2014

ground rule double 

Jacking off while you take a dump.

I almost hit 3 ground rule doubles last night!

ground rule double by the baseball king March 28, 2011

Ground rule double 

Ground Rule Double

I hit a ground rule double yesterday. First I did the blonde, then later that night the redhead droped by for a booty call!

Ground rule double by Smart Like That December 2, 2019

Ground-Rule Double 

When a guy finds himself in an unclear sleeping situation with a woman, he is entitled to "take second base" without comment or condemnation.

Guy #1: "Yo, I heard that (insert female name here) crashed in your bed last night."
Guy #2: "Yeah...nothing happend."
Guy #1: "What? You declined a ground-rule double!"
Guy #2: "Shit! Did I really?"
Guy #1: "Yeah, you were definitely entitled to boobie touch-age."

Ground-Rule Double by Cal Ripken Jr. April 2, 2011