1. people who cheat or swindle others
Usage: informal

Examples

• The police arrested several diddlers who had been running fake charity scams.
• Don’t trust those diddlers selling miracle cures door-to-door.
• The investment firm was shut down after investigators discovered it was run by diddlers.
• She warned her elderly neighbors about phone diddlers trying to steal personal information.
• The market was full of diddlers selling counterfeit goods to tourists.