Corpse
From DoomRL Wiki
Gibbing
Gibbing a monster stops it from leaving a corpse and from dropping items. This can be useful if arch-viles are present (or on Nightmare! difficulty).
To gib a monster you must kill it by dealing a large amount of damage. The amount of damage depends on the maximum health of the monster and the damage type of your weapon. Physical and shrapnel weapons must deal 400% of the monster's maximum health to cause a gib. Plasma and acid weapons must deal 200% of maximum health to gib. Fire weapons are the best at gibbing; they only need to deal 150% of maximum health.
It is also possible to gib corpses after the monster has already died. Corpses that are named after enemies (which excludes the arch-vile's "bloody corpse") have 1 HP and as much armor as the corresponding enemy. Corpses don't block bullets, so the only damage that can affect them is from explosions. (In practice, almost every explosion will destroy all corpses in its radius.)