toss up
• throw a coin into the air in order to make a decision between two alternatives, based on which side of the coin faces uppermost when it lands.
• "he tossed up between courgettes and tomatoes and courgettes won"
toss-up
noun
• the tossing of a coin to make a decision between two alternatives.
take a toss
• fall off a horse.
• "I took a heavy toss when my horse fell"
