It was subtle. A twitch in her eye. A stutter in the rendering of her shadow.
And in every scene, the glitch.
: This doesn't appear to be a standard English word or a widely recognized term in common use. It's possible that it's a name, a brand, a specific product line, or perhaps a misspelling or variation of a different term.
Some users seek these as historical records of specific casting eras or production styles.