Tits-up

The bird went tits-up, take another day or so to fix.

Source: wiktionary

Maybe she knows you and Mary will be taking her home, and that by next week she'll be sleeping under the cool green branches of a giant cedar tree instead of tits-up in some dusty cornfield.

Source: wiktionary

Next thing he remembered was blanking out, and waking to find himself tits-up in the S&P pit, a forest of undulating legs roiling around him.

Source: wiktionary

Yeomanry . . . militia forces. . . do I not make major-general by this time next year, I've either gone tits-up. . . or wasn't really tryin'!

Source: wiktionary