Meaning

noun a tiny or scarcely detectable amount

originOrigin uncertain; possibly from smitch (“(originally Scotland, chiefly US) very small amount or quantity”) + possibly -in (a variant of -ing (suffix forming nouns denoting things considered collectively)). Smitch is possibly: * derived from smitch (“smoke from a burning or smouldering thing; spot of dirt; blemish; dirt, grime”), a variant of smeech (“(southwest England) (dense or pungent) smoke;…

Etymology from Wiktionary, CC BY-SA 3.0