1. The combination of the words 'Ukulele' and 'Retard', thus making Ukutard.
2. It is someone who plays the ukulele to often and is therefore a retard for doing so.
Steve: "Hey mate, I've heard you strumming away on your ukulele all day, what gives?"
Alan: "I guess you should stop complaining."
Steve: "Shut up you Ukutard."
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failureshower.