As with the other baseball references to the bases (first base, second base, and so on) the grand slam refers to having anal sex. Since it is one up from a home run (just vaginal sex), and doesn't usually happen quite as often.
by Chris11 December 24, 2007
Get the grand slammug. involved with sexual intercourse. you start off knowing that you are going to round all of the bases. As you round all of the bases, you waive to the crowd like a pro. you take your time to round all of the bases to get the full enjoyment out of the moment. Then when u get past the home base, you high five your team who are all lined up from the plate to the dug out - and the party doesnt stop there.
by ummmm.. what tha June 5, 2005
Get the grand slammug. Wendy's term: Used when fry person needs a serving of fries, nuggets AND strips. Originally used by Luke and was forced into Wendy's terminology by Perry.
by DesPERRYado February 13, 2005
Get the grand slammug. Alfred Giggles:I have a quarter o , do you guys want to do a grand slam
Arnie Berkwitz: as long as it is free
Arnie Berkwitz: as long as it is free
by dj dubsack jones December 26, 2008
Get the Grand Slammug. by Forgott|e|n August 28, 2008
Get the Grand Slammug. by rrK_NAFK January 5, 2020
Get the Grand Slammug. bella: yo how many bases did you hit last night?
connor: grand slam baby
“wow i hit the grand slam last night!”
connor: grand slam baby
“wow i hit the grand slam last night!”
by gymgirl150 February 6, 2022
Get the Grand Slammug.