Someone who gets with a girl out of their league once. Now they think they can get with any girl they see. It tends to break confidence when they have a One Shot. Soon they start getting rejected by every girl they ask.
Ben had such a One Shot with Amy. No other girl will get with him.
A word that originates from Philadelphia. Jawn can literally mean anything. People over use it to sound more tough and cool but people from Philly know how to use it right.