PULL THE WOOL OVER SOMEONE'S EYES

WordNet Dictionary

	Definition:	[v] conceal one's true motives from esp. by elaborately feigning good intentions so as to gain an end; "He bamboozled his professors into thinking that he knew the subject well"

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	Synonyms:	bamboozle, hoodwink, lead by the nose, play false, snow

	See Also:	betray, deceive, lead astray