In the process of courting a young lady you try your luck by moving your head in the direction of her lips. This act usually occurs at the end of a social night. This may result in a "Shift" or a "slap" both of which you can "chat" to the boyz about.
I will gladly pay you Tuesday if you will contribute to the cost of my next alcoholic beverage [usually all of the cost of it, and then they sit down next to you, happy days!]