[koo-pon-ing, kyoo-]
  1. the practice of distributing discount coupons to consumers as a form of product promotion.
  2. the activity of seeking out or saving discount coupons to save money on food or household purchases.

Origin of couponing

First recorded in 1950–55; coupon + -ing1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018