Bodyque

This entity is not in the FGD by default.
It should not be put directly in a map because it is automatically generated by the game.

bodyque is a point entity available in all GoldSrc and Source games except Black Mesa.

GoldSrc

Four are created when a map loads. They are used as a 'queue' for corpses in multiplayer games. This will hold the four most recently killed corpses from players, and when a fifth corpse spawns, the oldest is eliminated.

Source

This entity does not do anything. It's advised to not put these directly into a map.

In code, it is represented by theCCorpseclass, defined in thehl2_gamerules.cppfile.

(For Source)