BOGOF

[ bog-awf, ‐of ]
/ ˈbɒgˌɔf, ‐ˌɒf /

noun

buy one, get one free: an offer to a customer to buy an item and receive a second item free, with the requirement that the second item be of equal or lesser value: retailers that use BOGOFs.

British Dictionary definitions for bogof

BOGOF
/ (ˈbɒɡɒf) /

adj acronym

buy one, get one free