on a/the toss of a/the coin

on a/the toss of a/the coin

1. Literally, based on the outcome of a coin toss (i.e., the 50% chance that it will be either heads or tails). The team who starts off with the ball is always decided on the toss of a coin. We both wanted the last slice of pizza, so we're letting the outcome be determined on a toss of a coin.
2. By extension, purely at random; relying entirely on chance. New restaurants come and go in this area, their fates essentially decided on the toss of a coin. The economy is such an unpredictable beast that it seems to change on a toss of a coin.
See also: coin, of, on, toss
Farlex Dictionary of Idioms.
See also:
  • toss a coin
  • a coin flip
  • a coin toss
  • flip a coin
  • pass current
  • heads or tails
  • Heads or tails?
  • shekel
  • shekels
  • Toss it!