Projectile Jinx

Waddiwasi
Incantation	wah-dee-WAH-see
Type	Charm
Effect	Fires an impacted object into the air.

Waddiwasi removes impacted objects and launches them through the air at the will of the caster.

Hogwarts professor Remus Lupin used this to dislodge a wad of gum that had been shoved in a keyhole by Peeves. After casting his spell, the gum went rocketting up Peeves' nose.

This could be the incantation of the Banishing Charm or the Placement Charm mentioned in Fantastic Beasts and Where to Find Them, under the Kelpie entry.

This could be the spell that Voldemort used to throw shards of broken glass to Dumbledore and Harry Potter during the Duel in the Ministry Atrium

Etymology

Latin vade, "travel." Possibly Swedish vadd, meaning "soft mass" (in this case, gum); or French vas y, "go there," as Lupin also directed the object upwards; or possibly from the English wad, as in "a wad of gum".