Go belly-up is a phrase used to describe a business or venture that has failed. It is derived from the phrase 'go belly up, ' which is used to describe a fish that has died and floated to the surface of the water. In this crossword, the solutions for the term are FOLD (4 letters), FAIL (4 letters), and OJXG (4 letters). FOLD means to bend or double over, FAIL means to not succeed, and OJXG is an acronym for 'Out of Joint, X-rayed, Gauged.' Together, these solutions suggest that a business or venture has gone out of joint, been x-rayed, and gauged, and ultimately failed.