When four or more of your friends hook up with the same girl at different times. Can only be completed if each person goes all the way (i.e. hitting a home run).
by YaMumz September 10, 2014
Get the Grand Slam mug.Term is used to describe the event of when you wake up with major morning wood the size of a Denny's plate full of breakfast awesomeness.
Eric: I woke up on my girlfriend's mom's couch to her whole family staring at my grand slam! Needless to say, they were quite impressed.
by RiddyTX June 17, 2015
Get the Grand Slam mug.Having sex with 3 women at the same time and having enough stamina to give all 3 of them an orgasm before you yourself have an orgasm.
by Agentzippo July 22, 2015
Get the Grand Slam mug.I hit my first ever Grand Slam the other day, you wouldn't believe it! A one-versus-five at 14-15, what a game!
by walterP_tv February 15, 2018
Get the Grand Slam mug.by fullsend101 September 27, 2018
Get the Grand Slam mug.