Stink Pellet

• Type: Magical Item (Joke Product)
• Owners: Various Hogwarts School of Witchcraft and Wizardry students; sold by Weasleys' Wizarding Wheezes
• Maker: Unknown, but associated with and sold by Fred Weasley and George Weasley

A Stink Pellet is a small, magical prank device. They are described as looking like “transparent glass-like spheres”. When these fragile spheres are broken, typically by being thrown onto a hard surface, they release a magically-produced, foul-smelling substance.

The primary and sole function of a Stink Pellet is to produce an extremely pungent and unpleasant odor upon being shattered. The smell is powerful and pervasive, described in the novels as being similar to dung or rotten eggs. They are used as simple but effective prank tools to cause disruption, clear a space, or simply to annoy others. Their use is strictly forbidden at Hogwarts School of Witchcraft and Wizardry, and they are a commonly confiscated item by the caretaker, Argus Filch.

Stink Pellets are mentioned several times throughout the series, typically in the context of student pranks and general mischief at Hogwarts School of Witchcraft and Wizardry.

• In Harry Potter and the Prisoner of Azkaban, Fred Weasley and George Weasley detonate a Stink Pellet in a corridor. Argus Filch mistakenly blames the poltergeist Peeves for the “dung-like” smell and complains about having to clean it up.
• In Harry Potter and the Goblet of Fire, an unnamed student sets one off in the Gryffindor Common Room, filling the entire room with the smell of rotten eggs while Harry Potter, Ron Weasley, and Hermione Granger are present.
• In Harry Potter and the Order of the Phoenix, Harry Potter sees Stink Pellets inside a filing cabinet drawer labeled “Confiscated and Highly Dangerous” in Argus Filch's office. This occurs while he is awaiting a detention with Professor Dolores Umbridge and confirms their status as a popular banned item.
• Though not explicitly named among the wares in Harry Potter and the Half-Blood Prince, they are precisely the type of prank product sold at Weasleys' Wizarding Wheezes, the successful joke shop run by the Weasley twins in Diagon Alley.

Stink Pellets appear as usable items in some of the Harry Potter video games. For instance, in the game adaptation of Harry Potter and the Order of the Phoenix, the player can use Stink Pellets to create diversions (video game).