kickback (Noun) — A commercial bribe paid by a seller to a purchasing agent in order to induce the agent to enter into the transaction.
kickback (Noun) — Payment made to a person in a position of trust to corrupt his judgment.
kickback (Verb) — (crime) pay a kickback; make an illegal payment.
kickback (Verb) — Spring back, as from a forceful thrust. ex. "The gun kicked back into my shoulder"