Twins. A reference to a Buy One Get One sale, two offspring for a single act of coitus. Can be used to refer to identical or fraternal twins; male, female, or both.
Phil: How old are Nancy's kids Steve: Seven.
Phil: Oh, they were BOGO?
Buy One, Give One. A social enterprisebusiness model popularized by TOMS shoes and later adopted by a number of other social businesses. For each item bought, another item is donated to someone in need.
One area of real growth is transaction-based giving, such as the "BOGO" model, in which a consumer buys a product and someone less fortunate receives the same product for free.