To awake one fine morn, and verily discover one's matress resembling a ordinance survey map with a rather warm chocolate log spread all over it as well as spew on your face and pillow.
"I do not think she will want to see me again after I came home totally ringbolted and grand slammed the bed, although your mum is a bit of a dirty slapper."
by Terry Fuckwit June 24, 2004
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
when you are heaving sex with a chick, take out a baseball bat and shove it up into her anal cavity, then pull it back out and hit the chick in the face with it.
by john February 14, 2005
by Matt November 03, 2003
by MoleDeMesa October 02, 2003