n'ombre
A loud, crazy way to say you think something is fake. Like when someone says they're a wizard and you say 'N'ombre!' because they're not.
He said he's a wizard. I said, 'N'ombre? You can't even do magic.'
She said she can talk to animals. I said, 'N'ombre? Your cat doesn't even look at you.'
He said he can fly. I said, 'N'ombre? You can't even jump high.'