by uscbam21 July 19, 2014

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
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

Another name for a mans cock and balls, or...
When a gay orgy is in progress one takes a handfull of a mans section between his anus and balls and bites it.
When a gay orgy is in progress one takes a handfull of a mans section between his anus and balls and bites it.
by Meow Mix December 27, 2003

When you get a girl to kiss your grundle, holding back your sack & balls - but betray her at the last minute by letting them flop onto her face.
"Baby see how soft my taint is - give my grundle a kiss!"
*flop*
"You benedict grundled me!? I feel so betrayed!"
*flop*
"You benedict grundled me!? I feel so betrayed!"
by mutorcs December 12, 2009

Look at that group of grundle huggers. All they ever do is talk about peace and then sex eachother..
by Shanunu July 26, 2009

when you are plastered off your arse and you hook up with someone so hideous not even fugly can cover how revolting this person is.
by ohmahjeeehaud February 4, 2008

by tobyistheworst November 18, 2011
