[countable] (also spelled spif) a special reward that a salesperson (= a person whose job is to sell goods) receives for selling a particular product（给滞销商品推销员的）特别奖励◆Spiffs were offered for selling PCs that otherwise did not sell well.为销售滞销电脑设立了特别奖。ⓘ Spiff/spif is formed from the first letters of ‘sales promotion incentive fund’.spiff/spif 是 sales promotion incentive fund 的首字母缩写。