kickback

n.	1.	recoil, of a gun or machine, as in older automobile engines when started by turning a crank.
	2.	A secret, and usually illegal, payment, by a recipient of money paid for goods or services, to a facilitator of the transaction, of a portion of that money;

Noun

1.

kickback - a commercial bribe paid by a seller to a purchasing agent in order to induce the agent to enter into the transaction

abatement, agio, allowance, backlash, backlashing, bank discount, boomerang, bounce, bound, breakage, bribe, carom, cash discount, chain discount, charge-off, commission, compensation, concession, contrecoup, cut, deduction, depreciation, discount, drawback, kick, payola, penalty, penalty clause, percentage, premium, price reduction, price-cut, rebate, rebatement, rebound, rebuff, recalcitration, recoil, recoupment, reduction, refund, refundment, reimbursement, repayment, repulse, resilience, restitution, return, reward, ricochet, rollback, salvage, setoff, share, spring, tare, time discount, trade discount, tret, underselling, write-off