Slosher

The Slosher is a main weapon in Splatoon and Splatoon 2.

The Slosher is a bucket of ink that can be swung to splatter turf and enemies in a straight line. The trajectory of the ink can be adjusted to strike enemies behind walls or on above high surfaces. It's strong enough to splat opponents in only two shots.

The Slosher deals constant 70 damage no matter how far away the ink travels, as opposed to rollers and shooters dealing less damage as ink travel farther due to fall-off damage. However, here is still fall-off damage when targeting opponents below the player, dealing less than 70 damage, but this tends to not be a problem due to the high damage output of the Slosher.

Splatoon
The Slosher was made available with the update. It comes in a set with the and.

Demonstration
https://www.youtube.com/watch?v=NGDEz7IfcK8

Splatoon 2
In Splatoon 2, the Slosher returns with a new design that is primarily orange instead of pink. It is described as having redesigned handle and suspension. It comes in a set with and. As of 4.0.0, the weapon no longer does a consistent 70 damage, but will deal a max of 50 damage if they're hit from above by the trail of ink between the primary glob and the player.

Demonstration
https://www.youtube.com/watch?v=2xO1s6HC_1E

Splatoon

 * The Slosher was first discovered in the June 24th datamine.
 * This weapon was later shown in a Japanese trailer detailing future Splatoon updates.

Splatoon 2

 * The weapon was first revealed to be returning in a tweet from the official Splatoon Twitter account on the 24th January 2017.

Etymology
Slosher is derived from the verb to slosh.

バケットスロッシャー baketto surosshā is derived from Bucket and the verb to slosh.