(1). A common expression used when confirming that two or more people are clear on what they are supposed to be doing, usually used when one person appears to be completely unclear on what he is supposed to be doing.
(2). In retail, a term used to describe a sale that lures naive customers into buying surplus, out of season products they will never use, by offering them 2 of these items for the same price.
“Hey Steve, did you see that BOGO sale going on over at Dick’s Sporting Goods? I know it’s May and the season just ended, but I think I am totally going to get into snowboarding next year! And if I buy one pair of snow pants, I get a second pair for free! How can I go wrong?