1 definition by Not your average sex guy

Top Definition
To lie face down with arms by sides in a plank like position on different objects or in creative situations.

Most popular in Australia.

Started as a facebook fan page craze

Can be potentially dangerous, one confirmed death from planking as of 16 May 2011.
Guy 1 "Yo, Check out Matt on that roof up there, what's he doin?"

Guy 2 "Aw he's just planking, last week I saw him on a letterbox."
by Not your average sex guy May 15, 2011

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