A round robin bet is a way to create multiple parlays from a set of selections. It allows a bettor to cover different combinations of the selected events, increasing the chances of winning something even if not all picks are correct.

Let's say you have three selections (A, B, and C) and you want to place a round robin bet. This will create three different two-team parlays:

1. Parlay 1: A and B

2. Parlay 2: A and C

3. Parlay 3: B and C

   
   

In this example, instead of placing one big parlay that includes all three selections, a round robin creates several smaller parlays. If one of your selections loses, you can still win some money from the other parlays.