Verb
lose his head (third-person singular simple present loses his head, present participle losing his head, simple past and past participle lost his head)
Alternative form of lose one's head
He who waits for the sword to fall upon his neck will surely lose his head. Stephen R. Donaldson
But I know human nature, my friend, and I tell you that, suddenly confronted with the possibility of being tried for murder, the most innocent person will lose his head and do the most absurd things. Agatha Christie