An ordinary-sized drink of liquor.
1836. The thimble conjurer having asked the barkeeper how much was to pay, was told that there were sixteen smallers, which amounted to one dollar.Col. Crockett in Texas, p. 83 (Phila.).
1842. Every puppy that would be keeled over with a smaller of rum and lasses turns up his nose at him.Phila. Spirit of the Times, Jan. 3.