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The act of thumping, with the thumb and middle finger, an adult male in the testicles. (derives from the term goose (to poke with a finger in the butt, and pecker (referencing the area of anatomy being struck))
Man, did you see those guys give there buddy a Chinese goosepecker? His nuts are going to bruised and swollen.
by Thumperton April 07, 2011
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