look up any word, like blumpkin:
n: A derogatory term used to describe someone who partakes in the noble sport of Extreme Lying Down, but refers to it as Planking.
Person 1: Hey man, you wanna come planking with me?

Person 2: Boy, you are lucky I don't smack you upside the head! You bloody Plank-Wanker!
by Funky W May 15, 2011