The Scythe is a melee weapon obtained from the Farm Event if you have a character with a high Fitness stat.
The Scythe has a high cooldown and is tiring to use, but has a very large swing arc and range and can hit many zombies in one swing, making it good for crowd control if a character has the Strength and Fitness to wield it effectively.
There is a variant of the Scythe that can be obtained by shaking hands with the Grim Reaper. This Scythe deals more damage and can hit one extra zombie per swing.