Meaning

noun a trap for catching mice

noun (American football) a play in which a defensive player is allowed to cross the line of scrimmage and then blocked off as the runner goes through the place the lineman vacated

originFrom Middle English mouse-trappe, mous trappe, mouse trape, equivalent to mouse + trap. Cognate with Dutch muizetrap, muizentrap (“mousetrap”), German Low German Muustrappe, Muustrapp (“mousetrap”). In the Internet sense, refers to a computer mouse.

Etymology from Wiktionary, CC BY-SA 3.0