When you suplex a chick during sex and try to put your dick in her vagina as you slam her down
I tried the grand slam last night. I think I sprained my penis.
by rrK_NAFK January 5, 2020
Get the Grand Slam mug.
The act of lodging the wide end of a tennis racket into ones rectum.
After I was done cumming on Jenny, I finished her off with a Grand Slam.
by TheCerealKiller June 17, 2014
Get the Grand Slam mug.
when the turd you're shitting starts touching the water in the toilet bowl, while still attached to your arsehole.
Evrytime i eat Tex-Mex, i get a Grand Slam
by Nicoprofound January 5, 2006
Get the Grand Slam mug.
When you have a one night stand, but get a piece of ass regardless. Whores do this. And they don't even have to date!
Yo mom had a grand slam date with me last night! Have fun with your new baby brother!
by DeAssFucker December 5, 2003
Get the Grand Slam mug.
A game usually played at high school dances, who's objection is to make out with at least one person from every grade, including your own. Another variation of the game is that, in order to win, you count each person you make out with by points. Someone in your own grade, for example, could rank as lower points than someone in the senior grades. The person with the most points win.
Virginia: We should totally play Grand Slam at semi tonight.
Jared: I definitely won Grand Slam; I'm only a niner and I made out with over 12 grade twelve bitties.
by Virginialikeswomen February 21, 2011
Get the Grand Slam mug.
N. The unusual situation of soiling three different pair of underpants in the same day.
What happened to Joey?

He had to go home. He hit a skidmark grand slam.

Man, that sucks.
by LobsterSausage February 11, 2011
Get the skidmark grand slam mug.
After marriage, when a couple has at least 4 kids. This could possibly happen within the first year of marriage if the couple has quintuplets, or within 4 years if they are diligent.
Zach and his wife keep poppin out babies like every single year. He is swinging for his 3rd mormon grand slam with this last baby.
by mormon_playa September 27, 2007
Get the mormon grand slam mug.