The ripe smelling portion of the male anatomy that grows some of the best fromunda cheese. Its best to be licked here with your whores finger in your ass while being simultaneouslyjerked off.
Shooowee, my girl was lickin' my grundle with a finger in my ass while she was jerking me off the other night, and when I came I almost shot her eye out!
Also known as the pereneum, taint, and a personal favorite SBAAB, the grundle is the space between the ass and balls...also the place ladies that you definitely want to aim for.