|1.||Flipping the Glass|
When a glass is to be flipped (an empty beer glass, placed upside down on the bar), means that you the drinkee must physically fight the toughest person in the pub/bar. The toughest person is usually everyone in the bar, due to the fact that everyone thinks they are the toughest.
I'm gunna flip the glass.
I will be flipping the glass today.