Definitions by Mr. Boab
Creeper
A green quadruped from the game Minecraft that is oddly shaped like male genitalia. These aggressive mobs, before exploding their victims into oblivion, hiss. The hiss is the only warning the player has of the creeper's presence, as creepers don't make sounds when they walk. The player then has approximately 1.5 seconds to vacate the range of the creeper before it has a chance to explode. When killed creepers drop sulfur (aka gunpowder).