[Glitch] …
is a temporary system failure – a temporary failure that corrects itself, making troubleshooting more difficult. This term is especially common among programmers, videogame players, but it is used by all types of systems – society, processes, perception, knowledge, thinking… design.

Glitch “suggests something more mysterious and unrecognizable, caused by surprise input or stuff outside of the code realm.” (Alex Peschel)

[Glitch art design] …
unintentional distortions caused by the digital crash led to the emergence of a seductive graphic design sub-genre.
Not only is this form of design visually stunning, but the provocative nature of glitch art creates an unforgettable image that highlights an idea or a product.