The act of getting in the 69 sex position and focusing all of your oral attention on your partners grundle. This act can be preformed by both heterosexual and homosexual couples.
Marc do you want to perform grundle play tonight? It would be a good time since both our grundle's have a musk to them and my asshole is sore from Popa Tuesday.
by Jill Weiss March 20, 2015
The perineum on a human male. Located between the scrotum and anus. Aptly named after the hairyness of the Grendel monster from Beowulf and a young polishman's genitals. Originated in Jessup Maryland circa 1994.
by Double Bs July 13, 2016
by The Grundle master October 25, 2005
Man 1: Oh man...
Man 2: What’s wrong?
Man 1: The grundle fondler Attacked my dick!
Man 2: Oh Shit!!!
Man 1: Yeah, it was so fucking gay!
Man 2: You need a doctor!!!
Man 2: What’s wrong?
Man 1: The grundle fondler Attacked my dick!
Man 2: Oh Shit!!!
Man 1: Yeah, it was so fucking gay!
Man 2: You need a doctor!!!
by Grundle_My_Fundle November 29, 2018
Where the victim gets grabbed by the gooch and is tipped forward while you pull their genitalia in an upwards motion (like a chainsaw).
by Deedoid February 03, 2017
The act of pressing on ones taint, in an effort to aid in the movement of extremely large, and rock hard turds.
Went to take a shit today and started giving birth to a 4 day old brick that was as long as a 20oz can of red bull. Had pull out the grundle assist. That was the last time I ate a whole plate of Mac and Cheese from there.
by JimmyJongTidings January 22, 2018
Dude, I was boning this girl last night, and her brother was awakened by the sound of my grundle smack.
by matt steve josh May 05, 2006