落馬

(lit.) to fall from a horse / (fig.) to suffer a setback / to come a cropper / to be sacked (e.g. for corruption)

to leave out / to be missing / to leave behind or forget to bring / to lag or fall behind

colloquial reading for 落[luo4] in certain compounds

to fall or drop / (of the sun) to set / (of a tide) to go out / to lower / to decline or sink / to lag or fall behind / to fall onto / to rest with / to get or receive / to write down / whereabouts / settlement

surname Ma / abbr. for Malaysia 馬來西亞|马来西亚[Ma3 lai2 xi1 ya4]

horse / CL:匹[pi3] / horse or cavalry piece in Chinese chess / knight in Western chess

Lok Ma Chau (place in Hong Kong)

lit. to be struck by an arrow and fall from one's horse / to suffer a serious setback (idiom)