LOS ANGELES, CA - FEBRUARY 10: Singer Katy Perry arrives at The 55th Annual GRAMMY Awards at Staples Center on February 10, 2
Jon Kopaloff/FilmMagic

"Prop bets" are, evidently, things that sports people/people with disposable income do when there's a #biggame coming up. (Per Wiki, via a sports illiterate: "prop" bet"= "proposition" bet, also known as "exotic," "novelty," or "side" bet.)

And there's a big prop bet about Katy Perry's Super Bowl halftime show, the one coming up this Sunday, February 1. The bet, happening on online gambling site BetOnline.ag, is whether or not Katy Perry's cleavage will make an appearance during her mini-concert in the middle of the big football game.

Take it away, Washington Post writer who seems to have a good grasp on this boob-tastic situation:

[Dave] Mason, who’s the brand manager of the sportsbook at BetOnline.ag, is saying that professional gamblers — “sharps” — really, really think Perry is going to show some cleavage during Sunday’s halftime show and are putting down some big money on it. Thus, the odds are shifting in hopes that people start betting on the opposite: That Perry will come out in a nun’s habit or a judicial robe or whatever and keep it on the entire time. When the odds are listed at -500, that means you have to bet $500 to win $100; in other words, it’s the expected outcome and you have to bet a lot of money to win anything. Alternately, if the odds are listed at +250, that means it’s the less-expected outcome — the underdog, so to speak — and you only have to bet $100 to win $250.)

Breasts, of course, have been a hot Super Bowl topic in the past. Beyond all the annual sexy commercials and the sexy (and life-changing) Beyoncé halftime show in 2013, there was #boobgate in 2005. That, for everyone born post-2005, was when Justin Timberlake briefly exposed Janet Jackson's breast, the areola of which was cover by a star thingy. It wasn't big deal, but it was also a HUGE deal, and the FCC fined CBS a hearty $550,000.

Go place your bets on Katy Perry's cleavage, though, if you're into that. Fuse will have live coverage of the Super Bowl halftime show this Sunday night.