yechEnglishOxford Dictionary of Englishyech /jɛk , jɛx / (also yecch) ▸ exclamation informal expressing aversion or disgust: he drank the stuff, too. Yech!. – DERIVATIVES yechy /ˈjɛki , ˈjɛxi / (also yecchy) adjective– ORIGIN 1960s: imitative; compare with yuck1.