vulgar slang The anus. That bout of diarrhea wreaked havoc on my balloon knot, I'll tell you that much.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. the anus (From its appearance.) Yeeeouch! Right in the balloon knot!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.