A boomerang is a hunting weapon, a throwing stick, invented by the native people in Australia. It had the advantage that if it missed its target, it would return to the thrower, so he could quickly use it again. English has adopted boomerang as a verb - but it usually means to come back and do bad things to its owner.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.