An insult; basically calling someone a bananahead is similar to calling them an idiot or a moron.
Lord of Karma is a bananahead if he thinks The Eraser isn't electronica.

by Tim34534543 August 4, 2006
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I love it when I hear a bananahead in "Star Wars: The Clone Wars" saying "Roger, Roger!"
by pentozali February 17, 2009
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hi bananaheads did you see that bongbong that yongying song
by Isabellee June 22, 2008
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