To impose on

Related to To impose on: impose upon
to pass or put a trick on; to delude; to cheat; to defraud.
to place an unwelcome burden or obligation on (another person); as, she imposed on her friend to drive her daughter to school.- Locke.
to take unfair advantage of (a person, a friendship); as, he imposed on his friendship with The Mayor to gain business.

See also: Impose, Impose, Impose