late 15c., from French esclicier, from Old French escliz (see slice (n.)). Golfing sense is from 1890. Related: Sliced; slicing. Sliced bread is attested from 1929 and was touted in advertisements; greatest thing since ... first attested 1969.
With the advent of ready sliced bread the bread board, the bread knife and the slicing machine pass out of the picture. Sliced bread is a radical departure in the baking industry and although the Weber Baking Company will continue to supply the trade with unsliced loaves, the company anticipates an unusual run on the ready sliced loaf. [Western Hospital Review, vol. xiv, 1929]
No matter how thick or how thin you slice it it's still baloney. [Carl Sandburg, "The People, Yes," 1936]
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Definitions of slicer from WordNet
a golfer whose shots typically curve right (for right-handed golfers);
a machine for cutting; usually with a revolving blade;
knife especially designed for slicing particular foods, as cheese;