"give a name to," originally "make a knight," from O.E. dubbian "knight by striking with a sword" (11c.), a late word, perhaps borrowed from O.Fr. aduber "equip with arms, adorn," of uncertain origin.
dub
"add or alter sound on film," 1929, shortening of double; so called because it involves re-recording voices onto a soundtrack. The type of re-mixed reggae music was so called from 1974, probably for the same reason. Related: Dubbed; dubbing.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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