A fork of Rural Dictionary
Similar to an Upper Decker, except you 1st lay a turd on the toilet bow lid. You then remove the lid from the upper tank and rapidly fling the toilet bowl lid into the open position, catapulting the turd into the upper tank. This is worse than an upper decker, because not only does the owner have a turd to fish out of the tank, but they also have a lid that requires cleaning as well.
Q: Why is their poo on the toilet lid?
A: Damn it, someone hit a ground rule double before they left our party!
When with a women you start off by swinging for the fences but something happens to where you are forced to stay at 2nd base.
"I was with this hottie last night, but my brother kept walking in the and out of the roomie, so instead of a home-run, I got a 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.
I hit a ground rule double yesterday. First I did the blonde, then later that night the redhead droped by for a booty call!