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1.
Code between jamming buddies to use the Flanger effect pedal on the guitar for the song they're about to play.
A warm hearted reference to Ned Flanders, neighbor of The Simpsons.
Ex ;

E - " What pedal you gonna use for that ? "

M - " Dude ! Ned Flangers man ! "
by Marc O.C. & Evan Z. July 28, 2010