Commonly referred to by people describing someone who is lesser than others. A very ignorant person, usually a male manager of a workgroup.
"My boss Brian is a Pecker Wood!"
"He calls himself Mister Big Drawers, but we all call him a Pecker Wood."
Term used in prison for white inmates in prison, used by other minorities as a racist comment, eventually the term was adopted by white supremacist gangs in the prison system as a name for one of their gangs.
Term comes from wood pecker, because they normally have red hair, and whites are the only people who have red hair.
"Look at that pecker wood over there."