The writer is very 'cavalier' [='careless'] about the truth.
She has a 'cavalier' attitude about/towards spending money.
He has a 'cavalier' disregard for the rights of others.
(..) Did he- Get him on the phone. Uh, o- okay. - And, Emily? - Yes? That's all. It's just the cavalier disregard for clear directions- Do you have Demarchelier? Uh, Demarchelier. - Leave it. - Do you have- (..)2006 The Devil Wears Prada