flip a coin

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flip a coin

1. Literally, to throw a coin into the air, with the outcome of something dependent on which side of the coin lands face-up. My brother and I used to flip a coin to decide everything when we were kids.
2. By extension, to give something over to chance, especially when two opposite outcomes are equally likely. At this point, we're just flipping a coin whether the car will get us the whole way to Denver or not.
See also: coin, flip
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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References in periodicals archive ?
For each coin-flip, participants are presented with a graphical representation of a boy who flips a coin and asks the participant to guess whether or not the coin has landed heads or tails (participants cannot see whether the coin has landed heads or tails).
I take it that the EGC defender will say Raul does something wrong, even though he flips a coin and does the action the coin indicates he should do.