sheeny n. + Add to list UK //ʃˈiːni// shee·ny Slang Vulgar SynonymsEtymology Synonyms glisteningglossyhymiekikelustrousshiningshinyyidEtymology 1YIשיין→ENsheeny Seems to have originated in 1820s London. Could be a mockery of Yiddish שיין (sheyn, “beautiful, nice”), much used in praising wares.Etymology 2 From sheen + -y.