grand slam 

when a guy cums on some ones face and then slams his penis across their face

man i grand slam that bitch the other day

grand slam by lui rodriguez May 30, 2007

Grand Slam 

When a girl is sucking a guys cock, the guys hits her over the head with a baseball bat and knocks her out.

Bro, I fucking grand slammed ur mom last night

Grand Slam by Freye December 17, 2008

Grand Uncle 

An uncle who is very grand and kind.
An uncle who is our uncle and also a grandfather.

My Grand Uncle gave me lots of cookies and made me fat.
My Grand Uncle is very chubby and has a big belly.

Grand Uncle by supercutekid November 19, 2011

Grand Opening 

When you use all of your fingers and toes, your penis, and your tongue, while thrusting your pelvis and giving a maniacal laugh. If done right, you can please up to 22 women.

Did you see that sith lord perform the Grand Opening? He was penetrating 22 women!

Grand Opening by Darth R September 13, 2007

Grand Slam 

When you fuck a four-person family, usually both parents and both children, though this can be interchanged (Three children, one parent, etc.) to your liking. MUST be an immediate family, cannot be a cousin, grandparent, uncle, etc.

"Bro I hit a Grand Slam on that Johnson family"

Grand Slam by BathtubBarracuda August 31, 2016

GRAND CANYON 

Wear you insert your dick into an obese person's fat crevaces.

I would do a grand canyon on that fat bitch

GRAND CANYON by TkevinM January 28, 2008

Grand Slam 

Who?

Seriously...who's that?

Grand Slam by gs August 21, 2003