be a toss-up

be a toss-up

COMMON People say that something is a toss-up when they think that two things are equally likely to happen or be chosen. She might go to Scapa. Or Rosyth. It's a toss-up really. They said it's a toss-up whether oil prices will go up or down over the days ahead. Note: When you toss a coin, there is an equal chance that the coin will land heads or tails.