Slosher (weapon class)
From Inkipedia, the Splatoon wiki
Sloshers (スロッシャー Surosshā) are bucket-like weapons in Splatoon. These weapons hurl ink straight ahead with a high range, and can be used to splat opponents high up, or on the other side of a wall.
The first weapon in this class, the Slosher, was released in the August Update on August 6th.