john heder 

Misspelled version of Jon Heder.

Person: John Heder is so poprockin'
Other person: His name is Jon, dickweed

john heder by the raconteurs August 31, 2008

john heder 

The awesome actor who played Napoleon Dynamite. (and no, he did NOT die in a car crash, thank you very much!)

"Dude, that John Heder guy is flippin' sweet!"

"Word."

john heder by Random Jones September 10, 2005