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"I am picking up some grundle today."
Grundle by Sticckky May 1, 2007
The little pieces of pooh and underwear lint that get caught in the hair around your anus.
My Grundles were making me itchy, so I picked them off.
Grundle by Bud Green February 7, 2004

double grundle bundle 

When one man is in the downward dog position, another man approaches from the rear in a crab walk inserting each other’s penises into the reciprocating anus, while relocating testicles to one side allowing for maximum grundle on grundle contact.
Hey man, the wife ran to the grocery. Think we got time for a double grundle bundle?
a breakfast sandwich usually consisting of sausage, egg (at least what the government tells us is egg) and cheese on a bagle or english muffin
oh snap! today is grundle day! I'm getting breakfast
Grundle by Rimmer April 7, 2005

Grundle Play 

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.
Grundle Play by Jill Weiss March 21, 2015
1. The small particulate matter or shake that remains in a stash of marijuana once all of the larger "dank nuggets" are gone.
2. (In male human anatomy) the area between the scrotum or ball sack and anus or butt hole respectively. Also commonly referred to as the taint.
1. Dood grundle is like smoking dust.
2. When I wrecked my bike the seat hit me right in the grundle.
Grundle by Sea of turds January 5, 2011