pass off
pass off  {v.}
1. To sell or give (something) by false claims; offer (something fake) as genuine. 
The dishonest builder passed off a poorly built house by pretending it was well constructed.
2. To claim to be someone you are not; pretend to be someone else. 
He passed himself off as a doctor until someone checked his record.
3. To go away gradually; disappear. 
Mrs. White's morning headache had passed off by that night.
4. To reach an end; run its course from beginning to end. 
The party passed off well.
Syn.: GO OFF.
Categories: 
 
Source: A Dictionary of American Idioms
