Left Turned Tab
A Left Turned Tab is a beer can with a tab on it to which you simply mark you beer by turning the tab all the way left creating a Left Turned Tab. This method is usually seen being used by professionals only so please turn your tabs at your own risk.
I have to use the restroom. I'm going to mark my beer by using the Left Turned Tab method since I see Johnny already crushed his in and I can't just hold it in my hand because I need both hands to use the restroom.