Waddiwasi is the incantation of a charm that can be used to shoot a small, soft mass of whatever the caster so desires at the target or victim. Professor Remus Lupin a teacher of Defence Against the Dark Arts at Hogwarts School of Witchcraft and Wizardry, used this charm to shoot a wad of gum at Peeves, the school's poltergeist, on 2 September, 1993.