1950s: possibly from Scots chad 'gravel, small stones' or dialect chat 'chip of wood'. It is not, as suggested, from the name of Mr. Chadless, inventor of a Chadless Keypunch: no such person has been found. Nor is it formed as an acronym from 'card hole aggregate debris'.
Words that rhyme with Chadad, add, Allahabad, bad, Baghdad, bedad, begad, cad, clad, dad, egad, fad, forbade, gad, glad, grad, had, lad, mad, pad, plaid, rad, Riyadh, sad, scad, shad, Strad, tad, trad
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