trooper

You will die the death of a trooper's horse, that is, with your shoes-on; a jocular method of telling any one he will be hanged.

Trooper
·add. ·noun A mounted policeman. II. Trooper ·noun A soldier in a body of cavalry; a cavalryman; al...

Webster's Dictionary of the English Language
trooper
n. a mounted policeman. The use istransferred from the name for a private soldier in a cavalryregim...

Dictionary of Australasian Words Phrases and Usages by Edward E. Morris