A portable mechanical, motorized saw. It is used to fell trees and remove branches and foliage. It's frequently seen as a weapon in horror films, often inflicting extremely bloody wounds and severing limbs.
A few characters use this as their weapon of choice, namely Leatherface, Haruna, Blaze (Arknights), Juliet Starling and Denji.
The following tags implicate this tag: holding_chainsaw (learn more).