1704, northern British dialect, "to seize, to catch," perhaps ultimately from Middle French caper "seize, to take," from Latin capere "to take" (see capable); or from Dutch kapen "to take," from Old Frisian capia "to buy," which is related to Old English ceapian (see cheap). Related: Copped; copping.
[origin uncertain; perhaps ultimately fr Latin capere ''seize,'' by way of French; police officer sense a shortening of copper; second sense ''seize, catch'' attested by 1704]