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
When you pull your penis as far back between your butt cheeks(chicken in the rough), and put it against a window to surprise someone
by Joe cock February 22, 2017
Rock band former by Phillip Lynott when Thin Lizzy split up. Toured Europe continuously but never recorded anything due to Lynotts untimely death.
Grand Slam bootlegs are very sought after by collectors.
by black flag May 29, 2004
A male performing a one night stand with a female successfully penetrating, and ejaculating in every love hole, before going to sleep.
by Mr.nunes March 10, 2009
When you have gotten to third base with someone, and instead of loosing your V card to only them, you have a Threesome instead.
Hank: Yo man you will never guess what happened last night with Janet.
Jimmy: Did you finally get to home plate?
Hank: Even better, her sister was there and wanted in, so I got a grand slam!
Hank: word
Jimmy: Did you finally get to home plate?
Hank: Even better, her sister was there and wanted in, so I got a grand slam!
Hank: word
by Daniel the Jewish Wordsmith July 11, 2008