n. an empty liquor bottle. (See also knock (so's) block off.) : Put your ems in the garbage, not on the floor.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
mutton
"flesh of sheep used as food," c.1290, from O.Fr. moton "ram, wether, sheep" (Fr. mouton), from M.L. multonem (8c.), probably from Gaulish *multo-s, acc. of *multo (cf. O.Ir. molt "wether," Mid-Breton mout, Welsh mollt). Transf. slang sense of "food for lust, loose women, prostitutes" (1518) led to extensive British slang uses down to the present day for woman variously regarded as seeking lovers or as lust objects.