what's your game?

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What is (someone's) game?

What is someone's agenda or ulterior motive? Why is someone doing this? I can't figure out why Janet is suddenly volunteering for the position she said she would never do. What's her game? Why are you trying to date my sister? What's your game?
See also: what
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

what's your (or the) game?

what's going on?; what are you up to? informal
Farlex Partner Idioms Dictionary © Farlex 2017

what’s somebody’s/your ˈgame?

(British English, spoken) used to ask why somebody is behaving as they are: Dan’s looking very nervous. Why? What’s his game?
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
Eventually a warden did show up - but it was the driver and the only action he took was to scowl at our photographer and shout: "Oi, what's your game?"
"It's about when you start seeing someone and you're like 'what's your game?' I know you know what I mean."