What is a "proposition bet"?

What is a "proposition bet"?

Frank Scoblete (Casino Gambling Expert & Bestselling Author) gives expert video advice on: How does a casino make money on sports betting?; Can I make Vegas sports book bets over the phone?; How do I collect on my sports book bets if I am not in Vegas? and more...

The sports book will offer certain proposition bets, these are high-odds bets, such as "the kick-off of the Super Bowl will result in a touchdown" -- it's a rare occurrence. Proposition bets involve betting on a very specific occurrence in a sports game or other event.