单枪匹马

Learn Today's Idiom (成语)

单枪匹马

dān qiāng pǐ mǎ

Lit. single spear and horse; fig. single-handed; unaccompanied

Traditional:

單槍匹馬

他单枪匹马打入黑社会团伙。

He single-handedly infiltrated an underworld gang.