a bonus or other form of remuneration given to retail salespeople for promoting the products of a particular manufacturer.
verb (used with object)
to reward (a salesperson) with a spiff.
Origin of spiff2
First recorded in 1855–60; origin uncertain
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
"make neat or spruce," 1877 (with up or out), probably from spiffy (q.v.). Related: Spiffed; spiffing.
Online Etymology Dictionary, © 2010 Douglas Harper