grenade

Short definition from Wiktionary

Noun

1. 1
   A small explosive device, designed to be thrown by hand or launched using a rifle, grenade launcher, or rocket.
2. 2
   A pomegranate.
3. 3
   A charge similar to a fireball, and made of a disc-shaped bomb shell, but with only one set of flames at the top.
4. 4
   An unattractive girl.

Verb

1. 1
   To use grenade(s) upon.
2. 2
   Of an engine: to be violently wrecked so that the internal components burst out.