to shit ,piss and vomit at the same time,usually when drink or disorientated from some sort of cock-slapping festival.
by Smiff2790 April 17, 2006
Get the Grand Slammug. 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 23, 2019
Get the Grand Slammug. 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 26, 2012
Get the Grand Slammug. by squirty girl April 21, 2012
Get the Grand Slammug. Rock band former by Phillip Lynott when Thin Lizzy split up. Toured Europe continuously but never recorded anything due to Lynotts untimely death.
by black flag May 29, 2004
Get the Grand Slammug. 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
Get the Grand Slammug. 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 2, 2008
Get the Grand Slammug.