| 1. | a percentage of income given to a person in a position of power or influence as payment for having made the income possible: usually considered improper or unethical. |
| 2. | a rebate, usually given secretively by a seller to a buyer or to one who influenced the buyer. |
| 3. | the practice of an employer or a person in a supervisory position of taking back a portion of the wages due workers. |
| 4. | a response, usually vigorous. |
| 5. | a sudden, uncontrolled movement of a machine, tool, or other device, as on starting or in striking an obstruction: A kickback from a chain saw can be dangerous. |

Kickback
A slang term used to describe the payment of something of value to another individual with the goal of persuading or influencing their decision or performance in certain situations.
Investopedia Commentary
A kickback may be in the form of cash or favors, and can be legal or illegal. A common form of kickbacks, in the context of investing, are commission rebates for investors who trade frequently.
See also: Commission