naughty step

noun

a place where a child is made to stand as a punishment for bad behaviour
to be on the naughty step to experience public disfavour, usu. because of perceived wayward behaviour

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