Noun
(chiefly UK) Abbreviation of buy one, get one free. (a retail promotion in which consumers may purchase two items for the usual price of one)
(chiefly UK) An item promoted in this way.
bogof (plural bogofs)
Alternative letter-case form of BOGOF
BOGOF all day Sun–Fri and till 7pm on Sat. Free pool with every round every day. Source: Internet