The Twitchy Ears Hex causes the ears of the victim to wiggle and twitch uncontrollably.
References from the canon
- Harry was hit with this hex as they practiced Hex-Deflection in Defence Against the Dark Arts (GF28)
It's rather funny that Harry's ears are twitching uncontrollably from the hex as Hermione wonders if Rita Skeeter is somehow eavesdropping on them with a magical bug. Actually, Rita was an Animagus beetle, so she WAS the bug (GF28, GF37). This also foreshadows the Weasley Twins invention of Extendable Ears in the next book (OP4).