Another word for anal sex. The process of staining your wood consists of a white male penetrating a butthole of his choosing and upon pulling out revealing a shit covered dick. Hence his wood has been stained.
Can be used as "stained wood" "staining my wood" or "wood staining"
"I spent all night staining wood"
"Me and my buddy spent all weekend staining wood with Stacy from accounting"
by Megatron81 July 7, 2014
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