palm something off
palm (something) off (on one) (as something else)
To discard something unwanted by giving or selling it to one (under the pretense of it being something else). There are always guys palming off cheap watches as Rolexes in this part of town. She tried to palm the hardest part of the assignment off on me as some kind of special challenge. Don't palm your chores off on me—I have my own to do.