A woman that doesn't know what to do during sex, typically a lazy girl or amatuer who lays on her back or stomach and planks while the man does all the work. Making this unpleasant to have sex with.
by RealGee August 27, 2016

The act of lying face down, palms flat against the sides, and feet together pointing at the floor. The event must take place in an odd location and shared via the internet to be considered an official "plank." It is allegedly dangerous.
by Etyman June 18, 2011

To plank: to have a planned wank. Being planned will involve some sort of preparation eg tissues ready, computer, 'special sites' etc
John: What are you doing tonight Will?
Will: I'm going to have a crafty plank, parents are out...
John: You sly dog.
or
Man A: I'm so stressed at the moment!
Man B: Why dont you have a plank tonight?
Man A: What's that?
Man B: *whispers in ear*
Man A: What, even with cushions and the lot? What a great idea, thanks bud!
Will: I'm going to have a crafty plank, parents are out...
John: You sly dog.
or
Man A: I'm so stressed at the moment!
Man B: Why dont you have a plank tonight?
Man A: What's that?
Man B: *whispers in ear*
Man A: What, even with cushions and the lot? What a great idea, thanks bud!
by aslyone August 29, 2010

by Plank April 9, 2006

by neo November 14, 2003

To lay completely rigid, face down on any surface. Your arms must be placed by your side, held straight and fingers pointed. Must also have a expressionless face.
Other known as "The Lying Down Game" (UK)
Other known as "The Lying Down Game" (UK)
by Plankaholic June 10, 2011

