Jelly-Legs Curse

"Point me!"

This article is about the Jelly-Legs Curse. You may be looking for the Jelly-Brain Jinx or the Jelly-Fingers Curse.

"Jelly-Legs Curse: Point your wand directly at your enemy and shout Locomotor Wibbly!'"

—Vindictus Viridian, Curses and Counter-Curses.^[src]

The Jelly-Legs Curse, also known as the Jelly-Legs Jinx (Locomotor Wibbly) is a spell that causes the victim's legs to collapse.^[1]

Known uses[]

Hermione Granger used this spell on Harry Potter while he was practicing the Shield Charm for the Third Task of the Triwizard Tournament.^[3]
Vincent Crabbe was hit with this jinx, in combination with Furnunculus, by Harry and George Weasley, causing little tentacles to sprout all over his face.^[3]

The Jelly-Legs Jinx seems to share some similarities with Tarantallegra, although the effects as described are slightly different; Tarantallegra makes the victim's legs thrash about uncontrollably, whereas this spell makes their legs shake.
In the GBC video game adaptation of Harry Potter and the Sorcerer's Stone, this spell is used to immobilize the opponent until they are hit with another spell.
When asked whether anything in the series reflects any of her childhood fantasies, author J. K. Rowling says, "...who wouldn't want to be able to use the Jelly-Legs Curse?"^[4]. This seemingly confirms that it is a curse, rather than a jinx.
There have been various mistranslations of this spell's name, such as "Jell-O Legs", "Jam Legs", "Broken Legs" and "Twisted Limping Legs", in the Chinese, Japanese and Vietnamese versions of the books^[5]

Curses and Counter-Curses
Spells included in the book: Full Body-Bind Curse · Leg-Locker Curse · Jelly-Legs Curse · Pimple Jinx · Stickfast Hex · Tickling Hex · Tongue-Tying Curse · Hair Loss Curse