wear the hat ride the cowboy - You’re having sexual relations the person who’s hat you’re wearing.
A practice in the south, at least in Texas, where a guy will give you his hat to let other guys know you are taken.
“Omg, Amy! Randy gave me his hat,” said Julia.
“You know what that means,” said Amy.
“No,” said Julia.
“wear the hat ride the cowboy,” said Amy. Ok