| steel trap | (n) an acute intelligence (an analogy based on the well-known sharpness of steel traps), Example: he's as sharp as a steel trap; a mind like a steel trap |
| steel trap | (n) a trap made of steel with a strong spring and sharp toothlike projections to hold the prey |
| 頭が切れる | [あたまがきれる, atamagakireru] (exp, v1) to be sharp; to be keen; to be on the ball; to have a mind like a steel trap [Add to Longdo] |