1. The ridgy part of one's lamp fixtures, usually preceded by the word "pwn."
"Man I totally pwnt those penubbles when I blew them up."
The predeccer to a penubble. Usually used in lower technological countries, such as France and/or Alabama. Often found in caves. Used in the fifth volume of the World Almanac by Galileo, and constantly made fun of by Kim Jong Il.
Kim Jong Il- "Those silly quorks are always burning my hair when I am in the cave blowing up nuclear weapons so now we have installed penubbles in all of our caves."
French person- "What's a nuclear weapon?"