bestofer Share definition Flag A bestofer is a person who only buys the "best of" albums of artists and that is all that he listens to, hence "bestofer". Sean says he is a Jethro Tull fan but he only owns the Best Of Album. Hence he is a bestofer. bestofer by Griffinfuhrer January 2, 2005 0 0 Get merch Get the bestofer mug. Buy Now — $32.95 See more merch