1 definition by Shrimpyy

Top Definition
When one lies in a stiff horizontal position (sometimes naked) on random objects or in random places. Eg) Walls, hedges, fire hydrants, cars, fences, lights, signs, trolleys etc. Usually accompanied by someone who takes a photo and posts it on the internet.
Catherine: dude can we go planking next week end in the city?

Emma: yeah that's MADD! Let's plank on the mcdonalds drive though sign!
by Shrimpyy May 15, 2011
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