トウモロコシのしん（で作ったパイプ） （corncob pipe）.
1. Recoil unexpectedly and violently, as in This rifle kicks back a lot when you fire it. [Early 1800s]
2. Return stolen property to the owner, as in The pawnbroker kicked back the paintings to the gallery. [Colloquial; first half of 1900s]
3. Pay back a part of one's earnings, as in The workers were forced to kick back half their pay to the agent. [Colloquial; first half of 1900s]