Old English -slician (in nigslicod "newly made sleek"), from Proto-Germanic *slikojan, from base *slikaz (cf. Old Norse slikr "smooth," Old High German slihhan "to glide," German schleichen "to creep, crawl, sneak," Dutch slijk "mud, mire"), from PIE *sleig- "to smooth, glide, be muddy," from root *(s)lei- "slimy" (see slime (n.)). Related: Slicked; slicking.
1620s, a kind of cosmetic, from slick (v.). Meaning "smooth place on the surface of water caused by oil, etc." is attested from 1849. Meaning "a swindler, clever person" is attested from 1959.
early 14c., "smooth, glossy, sleek" (of skin or hair); sense of "clever in deception" is first recorded 1590s; that of "first-class, excellent" is from 1833. Related: Slickly; slickness.
To reduce to smaller pieces, inferentially by cutting up: Congress is the single most unpopular American institution other than the income tax; slicing and dicing its committees will bring the GOP only high praise/ Derivatives allow people to transfer risk, to slice and dice it into little pieces and pass it on/ The Court decided that this broad requirement could be sliced and diced
[1970s+; fr the preparation of cooking ingredients by slicing and dicing them]