1. slang (in ice hockey, rugby, etc) an area off the field of play where a player who has committed
a foul can be sent to sit for a specified period
⇒ Warwick was sent to the sin-bin for blocking a rival by lying on him after a tackle.
2. British informal a special unit on a separate site from a school that disruptive schoolchildren attend
until they can be reintegrated into their normal classes
⇒ The excluded children were in the sin-bin.
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