Slug-vomiting Charm

The Slug Curse causes a person to cough up slugs. It causes a green jet of light.

Uses
In Harry Potter and the Chamber of Secrets, 2nd year Ron Weasley attempts to use this curse to attack Draco Malfoy after Malfoy calls Hermoine Granger a Mud Blood. However, because of his broken wand, the spell backfires and Ron ends with the curse.

In the film, Ron shouts "Eat slugs!" as the curse. In the book, no words are uttered. ''Ron plunged his hand into his robes, pulled out his wand, yelling "you'll pay for that one, Malfoy!" and pointed it furiously under Flint's arm at Malfoy's face. A loud bang echoed around the stadium and a jet of green light shot out of the wrong end of Ron's wand, hitting him in the stomach and sending him reeling backward onto the grass... Ron opened his mouth to speak, but no words came out. Instead he gave an almighty belch and several slugs dribbled out of his mouth onto his lap.'' (page 113).