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1 definition by Nib Oswald

 
1.
An act of lying face down atop an object, landmark, animal or other person, then stiffening one's form so that one's arms are firmly held by one's side and toes are pointed; taking on the physical characteristics of a plank.

Planking is usually recorded and uploaded to social networking sites to gain kudos for the level of comedy, aesthetic or endangerment accomplished in execution.

It is said to have originated in Adelaide, South Australia.
Nah dude, he's just planking the troposphere.
by Nib Oswald May 15, 2011
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