sin bin

noun

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
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012