Muggles' Guide to Harry Potter/Magic/Waddiwasi
|Muggles' Guide to Harry Potter - Magic|
|First Appearance||Harry Potter and the Prisoner of Azkaban|
The Waddiwasi charm apparently causes violent removal of chewing gum (possibly among other things) from the place that it is currently stuck.
Professor Lupin uses this spell when he encounters Peeves stuffing chewing gum into a lock. He says that this is a very useful little spell, before he uses it; and it is interesting, because the effect is to fire the chewing gum up Peeves' nostril and send him away, something that many teachers had been unable to do. As to its usefulness, though, it does not seem to be used anywhere else in the books.