cause to be circulated and accepted in a false character or identity; "She passed the glass off as diamonds"; "He passed himself off as a secret agent"
If an event passes off without any trouble, it happens and ends without any trouble. The main demonstration passed off peacefully
If you pass something off as another thing, you convince people that it is that other thing. He passed himself off as a senior psychologist I've tried to pass off my accent as a convent school accent. horse meat being passed off as ground beef