Seaman's Grundle

When two males are engaged in butt sex and one pulls out and cums all over his mates grundle.

Gay #1: Dude i'm about to bust
Gay #2: Shoot it on my grundle
Gay #1: You want a seaman's grundle?!

by Don Murphey McMaster July 10, 2009

newton's grundle

A phenomena occurring during gay sex where the giving man's scrotum slaps the receiving man's scrotum, sending them forward to the grundle then back to hitting the giver's scrotum, which then swing backwards, and repeats.

This is derived from the desktop toy known as Newton's balls

Hannable was riding Adam so hard that the Newton's Grundle could be heard from outside the bathroom.

by horribleperson24601 April 15, 2014

grundle smack

When you are boning a girl, and your sack slaps against your grundle (also taint, gooch, or chode).

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 15, 2006

Grundle Surfing

When you're having sex with a girl and you pop out, but try to get back in without using your hands, resulting in sliding on her grundle continuously, or surfing.

Man, I was fucking her and slipped out, but I was too lazy to use my hands so I was just grundle surfing for a bit until I got it back in.

by JiffyPop69 October 8, 2010

grundle sauce

the nutritious drink formed by the sweat between your anus and ballsack.

after taking his face out of ferman's ass, kenny quickly realized it was smeared with grundle sauce.

by beastiality December 28, 2005

grundle sludge

the combination of ballsweat and excess fecal matter which gathers in the grundle.

"In some countries grundle sludge is considered a delicacy."

by thaWhistle March 14, 2007

grundle slap

when a man stands with his legs spread a bit and swings his ball sack so that they slap his grungle area.

i dared my friend to do something embarrassing and he pulled his pants down and showed me the grundle slap.

by James Hill January 17, 2008