A Reverse Card is a card found in the standard Uno deck that comes in all of the four colors: Red, Blue, Green, and Yellow. When this card is played,
The order of play reverses the order of turns and is used as metaphorical.
House Rules
If Reverse cards are "stacked," the direction of play may either continue in the way that it was before the Reverse cards were played, or it may actually reverse. Whenever an even number of reverse cards are played, the Reverse cards will cancel each other out and the direction of play will continue in the way that it already was. Whenever an odd number of Reverse cards are played, the direction of play will actually reverse.
Example A: The order of play is clockwise. Jimmy plays a reverse card. The order of play is now counterclockwise.
Example B: The order of play is clockwise. Jimmy stacks two reverse cards. The order of play remains clockwise.
Example C: The order of play is clockwise. Jimmy stacks three reverse cards. The order of play is now counterclockwise.