Glotch is a cousin of the word Glitch, Glotching is when a game runs completely normal and does not glitch or lag ... this term can also be used in real life
Glitchtale is a series of web videos based on the video game Undertale by YouTuber Camila Cuevas. It started with a short animation based on the Genocide Run battle with Sans, and things just snowballed from there.
When software contains an overabundance of glitches. This term is frequently used to describe video games which developers released too early that are plagued by many bugs and game breaking glitches.