Kids who grew up with the goosebumps books being their exclusive favourite. Usually become reclusive gamers who like to quote Marx and then buy their pc set up off amazon.
Wait you were a goosebumps kid? Everything makes so much sense now.
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.