Its used only for special occasions. You must wear a top hat while receiving oral sex. Preferably you should have a mustache but its not mandatory. When you blow your load instead of busting in her eye like a jerk you trace around the eye like a gentleman(left eye or right eye it doesn't matter). After this the person looks as if they are wearing a monocle hence the name Baltimore Gentleman because i believe that gentleman in Baltimore wear Top Hats and Monocles.

When you eat dirt for the first time and leave your family to build a shack in the woods