nounjump to other results
something that no one can be certain about What will happen next is anybody's guess.
anybody's/anyone's guess(informal)jump to other results
a guess that is based on some degree of knowledge, and is therefore likely to be correct
an educated guessjump to other results
used to tell someone that you do not know any more about a subject than the person that you are talking to does “Who's going to win?” “Your guess is as good as mine.”
your guess is as good as mine(informal)jump to other results
to make a mistake Unless I miss my guess, your computer needs a new hard drive. If you miss your guess, you lose 10 points.
miss your guess(informal)jump to other results