have a mind like a steel trap

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have a mind like a steel trap

To be able to understand or grasp information quickly. David has a mind like a steel trap, so if you give him the instructions, he'll follow them perfectly.
See also: have, like, mind, steel, trap

mind like a steel trap, have a

Be very quick to understand something, as in Aunt Ida may be old, but she still has a mind like a steel trap. This simile likens the snapping shut of an animal trap to a quick mental grasp.
See also: have, like, mind, steel