An individual that performs actions, not caring about the outcomes or injury’s that can accumulate from this action
That Big Nut Billy over there is about to jump that porta shitter over that there Walmart.
A billy casual is someone who plays every competitive esport but plays it casually and is not good at the game and never gets better. Also known as a Barlow.
guy 1. "Man you're such a billy casual"
guy 2. "I'm a what?"
guy1. "You play like a Barlow"
guy2. "Oh man I need to get good then"