What one says a boy or male is doing when he lounges about with his hands in his pockets. This is a term usually used in convent /Jesuit schools and institutions and suggests that the subject is playing with his testicles.

Pocket Billiards: the act of intermittently playing with your testes, scratching them by sliding your hands in your pocket. I was lucky to observe some top rank players during my school day, thanks to whom this word was born