A "coin toss" refers to a game where a coin is thrown into the air and the result is determined by which side lands facing up. It is often used to make a decision when both options have an equal chance of happening. Full definition
If they start doing the foot race instead of coin toss for tiebreakers, Landry won't be useful at all (sbnation.com)
Contingent fee work is more complicated than betting on coin tosses. (slaw.ca)
More than eight out of every 10 teams that won the opening coin toss in 2015 chose to defer — seven years ago, it was less than one out of every 10. (si.com)