to shit ,piss and vomit at the same time,usually when drink or disorientated from some sort of cock-slapping festival.
by Smiff2790 March 14, 2006
a common sex act in the colorado and rocky mountain area in which one sexual partner purchases a grand slam from Denny's restaurant, places the entire meal in his or her partner's ass, and eats the entire thing seasoned as preferred...hot sauce is commonly recommended
I was hitchhiking with a trucker, when we became really hungry. As we passed by Denny's, we decided the best way to fix our qualms would be to share a grand slam.
by rossthehaus June 07, 2011
That moment when you come home pissed, then end up Throwing up/pissing/shitting yourself at the same time.
by PurpleAki-thelength February 06, 2020
A foursome. Where as 'hitting a home run' means scoring with one chick, a grand slam means four runs so four chicks.
by matt January 06, 2004
A “Grand Slam” is the act of deficating on the front most edge of a toilet bowl and bringing the lid down to splatter the feces all over the place
by Clarence TCS January 24, 2019
When you go from first base, to second, to third, and to fourth base multiple times throughout the night.
"Dude last night I got a Grand Slam from Ashlee"
"Nice Bro! I would kill to even go to first with her!"
"Nice Bro! I would kill to even go to first with her!"
by TheLoveDrunkPoet June 23, 2012
That wasn't an orgasm, that was a grand slam.
by squirty girl February 19, 2012