off (with sth)
1.
to try to stop sb asking questions or complaining by telling them sth that is not true :
Don't let him fob you off with any more excuses.
She wouldn't be fobbed off this time.
2.
to give sb sth that is not what they want or is of worse quality than they want :
He was unaware that he was being fobbed off with out-of-date stock.