The phrase "more belly up" can be used to describe something that has failed or gone bankrupt. If you're looking for synonyms for this phrase, there are a few other options to consider. One alternative is "in the red," which is often used to describe a business or individual who is operating at a financial loss. Another option is "down the drain," which can be used to describe a situation where resources have been wasted or lost. Finally, "out of business" is a straightforward synonym that can be used interchangeably with "more belly up." Regardless of which synonym you choose, all of these phrases generally denote a negative financial outcome.