While sports such as football in the UK have red and yellow cards that can be shown to players, GAA has something a little bit different: a black card.
In GAA matches, a black card can be shown to a player who has committed a cynical foul. After being shown a black card by the referee, the player must go to a sin bin for a period of 10 minutes, which has the impact of leaving their team at a disadvantage during that time.
At the end of the 10 minutes, they are able to join their team-mates back on the field of play.