This category is for made-up incantations that have no magical effect (or produce a magical effect that is random and destructive), whether intentionally, as a prank or deception, or unintentionally, as a mispronunciation of an actual incantation.
“The spell to turn Scabbers yellow is a nonsensical and made up spell by Fred Weasley that...Spell to turn Scabbers yellow
“Hocus Pocus was one of three spells that Harry Potter uttered the incantations of to scare off...Hocus Pocus
“Squiggly wiggly was one of three pretend spells that Harry Potter made up in order to frighten...Squiggly wiggly
“Jiggery Pokery was one of three spells that Harry Potter uttered the incantations of to scare...Jiggery Pokery