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1 definition by WelshPoeticWaxLady

 
1.
The act of inserting a stick of butter (or margarine, depending on preference) into a receiving partner who is bent over, gripping their ankles with their hands.
Dude, you did NOT do the Butter Shawm Johnson!

or

WTF?! She let you do the Butter Shawn Johnson?! Wackest shit I heard today!
by WelshPoeticWaxLady August 09, 2008