A musical instrument which is played by expanding and compressing the bellows while pressing down buttons, keys, or a combination of both (depending on the kind of accordoin). The accordion has long received a bad repuation and been known as the worst instrument ever. However, the accordion isn't bad. It's just misunderstood.
Contrary to popular opinion, the accordion isn't only a crappy polka instrument. I can be sucessfully used in many style of music including: Cajun music, Zydeco, Tango, Irish music, and (surprise, surprise!) rock.
I saw an amazing accordion player today. He was really rockin'. But then someone came up and shot him in the head for playing the accordion.