Uburnium is the most powerful and economical fuel source in the entire universe. So much so that it became a target for Jumba's evil genius, who tried more than once to create an experiment that would consume the resource to cause a massive fuel crisis throughout the galaxy.
His first known attempt was with Experiment 177 (later known as Clip). However, the word for Uburnium is the same as the word for "hair" in Jumba's native language, and the resulting experiment turned out to be a hair-eater. Clip proceeded to eat almost all of Jumba's hair, leaving him with his trademark hairstyle.
His second known attempt was with Experiment 225 (Mashy), who was designed to crush precious orbs of Uburnium in his massive jaws.