To be pedantic, although I think most of the above meanings are much more accurate: glitch 1962, Amer.Eng.,possibly from Yiddish glitsh "a slip," from glitshn "to slip," from Ger. glitschen, and related gleiten "to glide" (see glide). Perhaps directly from German; it began as technical jargon in the argot of electronic hardware engineers, popularized and given a broader meaning by U.S. space program.And it looks like 'glitschen' (or glitchen) is also a word in the parallel universe known as RL.