The business 'went belly-up' [=went bankrupt] during the long recession.
The team 'went belly-up' in the play-offs.
a middle-aged man with a big 'beer belly'
(..) It's a hoot that you don't get why we need this. Tony, maybe this might not be the time. Really?! That's it? You just roll over, show your belly, every time somebody snarls. Only when I've created a murder-bot. We didn't. We weren't even close. Were we close to an interface? (..)2015 Avengers: Age of Ultron