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spiff2

[spif]Slang.
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noun
  1. a bonus or other form of remuneration given to retail salespeople for promoting the products of a particular manufacturer.
verb (used with object)
  1. 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. 2018

Word Origin and History for spiffs'

spiff

v.

"make neat or spruce," 1877 (with up or out), probably from spiffy (q.v.). Related: Spiffed; spiffing.

Online Etymology Dictionary, © 2010 Douglas Harper