Wiktionary
pull the wool over someone's eyes
vb. (context idiomatic informal English) To deceive (someone).
WordNet
pull the wool over someone's eyes
v. conceal one's true motives from especially by elaborately feigning good intentions so as to gain an end; "He bamboozled his professors into thinking that he knew the subject well" [syn: bamboozle, snow, hoodwink, lead by the nose, play false]