An enemy in a horribly popular game called minecraft. These enemies, or mobs, as a lot of people call them, make no noise, they are silent as the breeze, and will wait around a corner to ambush you. Upon getting within one meter of you, they commit suicide, and violently explode, killing, or maiming the player, and destroying the blocks around, leaving a crater/ hole in the wall for the player to fix upon respawn. Many would say that they look like four-legged, 2-meter-tall, green penis, with the most haunting frown on their faces. The best description of a creeper can be found on google images.