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!
by aslyone August 29, 2010
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OMG did you see the way she is dressed, She is such a Plank
by x0xBrokenxInsidex0x September 12, 2009
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I just planks that piece of wood and sent it down the stream for other to enjoy.

Jeff was such dick last night when I was here so I planked his grill that asshole.
by mrdavidc May 26, 2011
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Awesome.
Exceptional.
Amazing.
In good taste.
Beneficial.
"Man, this record is plank."
"I saw a show last night, it was plank."
by avieth March 4, 2008
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Probably describes someone named Josh.
Stupid
What an absolute plank
by MADLADS September 18, 2019
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a 270 pound hulking machine that attends Bull Shit High School, the biggest kid in his class, plays on the football team, eats a lot, and prtoects females everywhere

new size on size chart: S, M, L, XL, XXL, Plank
"Yo, here comes Plank."
"OH SHIT!! HES GONNA EAT US!!!"
"Run away!!"
by Tank April 12, 2005
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