pull the wool over somebody's eyes

pull the ˈwool over somebody’s eyes

(informal) deceive somebody; hide the truth from somebody: It’s no use you trying to pull the wool over my eyes; you didn’t go to school again today, didn’t you? OPPOSITE: open your/somebody’s eyes (to something)This idiom may refer to a time in the past when judges and other important people wore wigs made of wool. If somebody pulled the wig over their eyes, they were not be able to see what was happening.
See also: eye, over, pull, wool