When you reach around to jerk yourself off and you accidentally give your asshole the thumbs up
Smell that? Thats stink thumb
by garygohome September 20, 2013
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A variation of the shocker. However, instead of using the pinky finger for the anus, using the thumb.
I showed her some southern hospitality when I gave her the Mississippi stink thumb.
by The Wobbly H Pirate February 10, 2005
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