|"Are you a wizard or not?"
The title of this article is conjectural. Although it is based on canonical information, the actual name is conjecture and may be supplanted at any time by additional information released from canonical sources. If this occurs, please move this page to the appropriate title.
The leek jinx (incantation unknown) is a jinx that makes leeks sprout out of the target's ears.
In 1994, a fourth year Gryffindor and a sixth year Slytherin were sent to the hospital wing suffering from the effects of this jinx before the highly-charged atmosphere of the Gryffindor-Slytherin Quidditch match.