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1.
An occurence by which a person is beaten about the head and shoulders with a nightstick or other wooden club.
"HAW HAW HAW,that nigga resisted arrest,and got a wood shampoo for his troubles."
by CrowTard March 10, 2006
 
2.
Being beaten by a wooden baton.
Billy got a nice dose of wood shampoo from the police.
by Paladin. October 24, 2011
 
3.
When somone jizzes in another person's hair
Person 1- Dude, Tom totally got a wood shampoo from Tres!

Person 2- Well, he had to earn that trust somehow
by stuckatKAF April 25, 2010