Wiktionary
alt. 1 A utensil used to mash potatoes. 2 (context military slang English) A type of hand grenade resembling such a utensil. n. 1 A utensil used to mash potatoes. 2 (context military slang English) A type of hand grenade resembling such a utensil.
Wikipedia
A potato masher or bean masher is a food preparation utensil used to crush soft food for such dishes as mashed potatoes, apple sauce, or refried beans.
Usage examples of "potato masher".
I listened and decided which wall it was coming from, and then I picked up an old wooden potato masher that was lying around and went rat-tat-tat on the wall myself After that there was no more knocking.
The axle formed the main body of the vessel and was shaped like an old-fashioned potato masher, with a handle projecting from one end of a thicker cylinder.
The potato masher slipped out of her fingers and hit the counter with a metallic ring.
The potato masher grenade was one German weapon he hadn't been taught to dismantle, but it was easy enough with American grenades.