play for a sucker("He wrote me that letter because he had a guilty conscience. He had played me for a sucker and he was too nice a guy for that to rest easy on him." (Raymond Chandler)ART Vancouver)
be feeding with empty calories(He'll know if we're feeding him with empty calories. – Он поймёт что к чему, если мы будем водить его за нос. They won't be empty. – А мы не будем.Alex_Odeychuk)