noun
a device or setup that is intended to catch someone in a trap or to cause harm or injury
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The soldiers were trained to detect and disarm any booby traps set by the enemy.
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Watch out for that booby trap in the hallway, it's a sneaky one!
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I almost fell for the booby trap that my friend set up as a prank.
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The contract had several hidden clauses that acted like a booby trap for unsuspecting clients.