The rather difficult task of masturbating with the left hand while using the right hand on a mouse to navigate porn on the Internet.
With practice you can become ambidextrous; however that in no way discriminates against ambidextrous men who are born that way.

Someone who smokes cannabis; a stoner. A normal cigarette is called a "right-handed cigarette" and a joint is called a "left-handed cigarette". This is a special code used to allow people to speak freely in public about their plans to smoke pot.

Term used for Smoking pot. "Drink in my right hand, joint in my left!"

Homosexuals, Army slang