"Pencil Thin Mustache" is a song written and performed by American popular-music singer and songwriter Jimmy Buffett. It was released as a single (with "Brand New Country Star") on Dunhill D-15011 in August 1974. It was first released on his album of 1974, Living and Dying in ¾ Time. It just missed the Billboard Hot 100 at number 1 on Bubbling Under Hot 100 Singles, and reached number 44 on the Easy Listening chart. Cash Box called it a "laid back honky tonker with incredible lyrics and a totally believable performance from Jimmy."