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Male genitalia, particularly the scrotal assembly (scrotum and testicles).

One of the oddest human body parts, no one knows exactly why the scrotal assembly is put together the way it is. However, many scientists now theorize that, much like the worm-lure tongue of the Alligator snapping turtle, the scrotal assembly's appearance evolved as a lure to help prehistoric man catch and kill otherwise deadly wooly mammoths.

When a mammoth was spotted, one man would climb onto a stump, rock, etc. and shout out mammoth calls while dangling his junk in full view of the animal. The mammoth, entranced by this display, would stumble drunkenly toward the man with its mouth watering and its trunk outstretched ready to pluck the sweet sweet prize from the hunter.

Then, suddenly, the rest of the hunters would spring up from behind the bushes and spear the mammoth which, even while dying, would never take its eyes off the bait. Often, the mammoth's mouth would continue to water for an hour or so after death, and while some speculate that this was merely a reflex action, others suspect that as the mammoth's brain shut down, it saw before it a brilliant tunnel of light with hundreds of juicy nutsacks at the end.

After the extinction of the wooly mammoths, the scrotal assembly has become essentially a vestigial appendage whose unique appearance no longer serves a purpose, much like the appendix.
HHHuuuucccgh!!!! It got me right in the bait!
by GabrielSix March 28, 2005
To bait means to vomit.
"I drank so much alcohol that i baited twice."
by kayte5 November 15, 2006
A single off of an album.
The bait off of the new Game album is awesome.
by alex November 07, 2006
The male genitalia. Required to masturbate.
I've got plenty of bait, but I would hardly call myself a master.
by Ben Cannon June 11, 2005
That party last night was bait!
by _issi_ February 28, 2009
Bait is the food taken to work by miners down the pit.
Common usage in NE England

A "bait tin" is what he carried it in.

Sometimes called "Snap" further south.
"I'm starvin ... I haven't had me bait coz I left me bait tin at yem (home)"
by worryem September 11, 2014