A sarcastic response to poor quality yet humorous animation in professional anime. It may also apply to poorly made fanart if it's humorous enough.
Originating from 4chan's /a/ board, "QUALITY" (in all caps) is a joking response to glaring yet humorous errors and flaws in the illustration or animation of a professional, commercial work. This can be caused by poor budgeting (blowing most of the budget of an anime into the first episodes, per example), a small budget or outsourcing to cheaper studios, although it can also be as a result of a honest mistake.
The Japanese equivalent is "ヤシガニ" ("Coconut crab"), a reference to Lost Universe's 4th episode which, due to the show's notoriously bad animation, was turned into a byword for bad animation in general. A more descriptive term is "作画崩壊" ("Animation collapse").
This tag can be applied to any posts that intentionally recreates the disfigured art or animation frame for humorous purposes. Do not apply this tag to poorly drawn works in general. For errors unintentionally made by an artist, see artistic error.
