Bargain BONANZA is a term used to describe a SALE event that offers great deals and discounts. It is often used to refer to a large-scale SALE, such as a clearance SALE or a seasonal SALE. The term BARGAIN BONANZA can be broken down into two words: BARGAIN, which is a 4-letter word meaning 'an advantageous purchase', and BONANZA, which is a 7-letter word meaning 'an unusually large amount of something'. Together, the two words form a phrase that describes an event where customers can find great deals and discounts.