Similar to a chinese fire drill. However, instead of waiting to get to a stoplight, participants exit the car while it is still moving. Can be performed with multiple cars and also with multiple cars where only the drivers switch. This manuever is usually preceded by several pints of guinness.
Alex: ......a chinese fire drill? Does it involve fireworks?
Ben: I said irish fire drill you retard. Its a cocktail with 2 parts beer and three parts stupidity.