Point wand at target
Victim vomits slugs
- "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 backwards onto the grass. Ron opened his mouth to speak, but no words came out. Instead he gave an almightly belch and several slugs dribbled out of his mouth onto his lap."
The Slug-vomiting Charm (incantation unknown) is a charm used to force the victim to belch up a number of slugs. Hermione Granger described it as a "difficult curse to work at the best of times", and it should be noted that there is no counter-spell; rather, the victim has to wait for the spell's effects to end on their own.