
Poacher turned gamekeeper
Role Reversal
Describes someone who switches sides, often having insider knowledge which makes them effective in their new role.

The former spy is a poacher turned gamekeeper now, using his skills to catch other spies.
Figurative Use
The phrase is used metaphorically and is not about literal poaching or gamekeeping.

She argued against the tobacco industry but as a poacher turned gamekeeper, now advocates for smoking rights.
Unexpected Transition
The switch in roles is often surprising or ironic, given the person’s past.

The notorious car thief became a poacher turned gamekeeper, running a car security business.
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