swipper

Etymology From Middle English swiper (“agile, nimble”), from Old English swipor, ġeswipor (“astute, cunning, shifty”), from Proto-West Germanic *swipr, from Proto-Germanic *swipraz (“quick, clever”), from Proto-Indo-European *sweyb- (“to bend, turn, swing, sway, swerve, wander”), equivalent to swipe + -er. See swoop.