subs. (American thieves).A drunken man. [An intensification of drunk as a lord; whence drunk as an emperor.]
1881. New York Slang Dictionary. On the Trail. A pinch for an EMPERORS slang.
DRUNK AS AN EMPEROR, phr. (common).An intensitive of drunk as a lord. Fr., saoul comme trente mille hommes, or un âne.
1785. GROSE, A Classical Dictionary of the Vulgar Tongue, s.v.