pass off phrasal verb ( see also ↑ pass )
1 . pass off well/badly etc if an event passes off well, badly etc, it happens in that way:
The visit passed off without any serious incidents.
2 . pass somebody/something off as something to make people think that someone or something is another thing:
They bought up pieces of old furniture and passed them off as valuable antiques.
He passed himself off as a doctor.