Put your money where your mouth is. Fish or cut bait. S--- or get off the pot.

''Fund and man this project to proper levels or let me out of this loozer contract.''

This idiom is a response to non-committal behavior and is not the same as ShapeUpOrShipOut.

Also used as a response to arguments repeatedly advanced without evidence or justification, as a call either for that evidence or the retraction of the argument...see ThatIsJustTheWayWeDoThings.
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CategoryIdiom