2
An extremely painful excersice in which one puts their elbows and toes on the ground and straightens their backs. aka Bows and Toes.
PLANK. up for 60 seconds, down for 10
by Nothereman May 21, 2006
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4
There are three types of planks:

A plank of wood
Jonny 2x4's best buddy (From Ed, Edd and Eddy)
or a realy dumb fuck

Choose wisely
Where's my bloody plank?
Don't say anything plank!
What a complete and utter plank!
by Diccyc April 02, 2005
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6
The clever combination of the words Please and Thanks. Often used after the realisation that you forgot to say please in the first place. Planks has nothing to do with planking.
"Hey mate, pass me the bong"
(Mate passes bong)
"Planks mate"
by V man #1 May 30, 2013
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