Balloon knot

[Jessica]

character on Bubba the Love Sponge show, on Sirius Satellite Radio

[Becky]

a tight butt hole that hasnt recently seen any form of penetration, thus giving the illusion of the knot of a balloon

[Couch Potatoe]

The anus.

[Dave Paprocki]

if you spread open the knot of a balloon, the resultant view is similar to that of the anus

[Tanya Shivari]

Balloon Knot; Noun; A persons Butthole. Preferably a womans.

[Hina Muqadas]

(noun) A persons anus.
(adjective) Having the appearance of an anus.

[PussyCat]

Noun referring to the female anus.

[Luis Fok]

That delicious part of a womans body that is the most ignored. While spreading her butt cheeks, you apply your nose to her anus and slowly inhale the scent of her bunghole and enjoy the aroma and begin to lick and suck the taste right out of her turdcutter. Once her gumhole is ready, you might get to cornhole her and bust a gooey nut deep in her tailpipe.

[Luis Fok]

blow up a balloon, pop it, turn it inside out around the knot and stretch it, looks amazingly like the anal sphincter.......yum yum