It's anyone's call spoken language phrase
Used to indicate the outcome of a situation is impossible to predict. It's usually used to talk about a competition
The match was extremely intense with furious counterattacks from both of the teams. It's really anyone's call.
I think tonight's basketball match will be anyone's call because both teams are the strong ones in the south region.
A: "Who do you think will be the champion in today's tennis final?" B: "Well, its anyone's call, really."
Most people believe that this phrase most likely derives from a sports where a referee had to “make a call”, meaning he had to make a 'verdict'. (Source: gingersoftware.com)
Daughter: So I really want all my friends to have a great time. I was thinking it would be a good idea to have some candy out on the tables for people to snack on.
Mother: Well, if you want them to really enjoy themselves, candy is dandy but liquor is quicker.