ಅರ್ಥ : An acute intelligence (an analogy based on the well-known sharpness of steel traps).
ಉದಾಹರಣೆ :
He's as sharp as a steel trap.
A mind like a steel trap.
ಅರ್ಥ : A trap made of steel with a strong spring and sharp toothlike projections to hold the prey.