anything can/might happen
anything can happen
Any outcome is possible. The game's not over yet, so try not to be so pessimistic—anything can happen.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
anything can/might ˈhappenused to say that it is not possible to know what the result of something will be: ‘There’s no way we’re going to win this match!’ ‘How can you be so sure — anything can happen!’
Farlex Partner Idioms Dictionary © Farlex 2017