马仰人翻

idiom

variant of 人仰马翻: to fall off horses and overturn people; to suffer a crushing defeat; to be thrown into utter chaos

This is a non-standard variant character order for the idiom 人仰马翻 (people on their backs, horses overturned). The standard form 人仰马翻 is the only accepted form in modern standard Chinese; this variant appears occasionally in error or dialectal usage but should be avoided in formal writing.