Karl Smith. See also insincere.
You're doing very well! No really, good job, you're doing well!
to profess ignorance while actually being in the know.
Paris Hilton expressed a disingenuous opinion about the business operations of Wal-Mart.
"Do they sell wall stuff?"
Insincere, not straight-forward
Maintaining an air of credibility when faced with your own lack of sincerity and honesty.
Mike: Fancy getting together later?
Jane: Won't your girlfriend mind?
Mike: What girlfriend?
Jane: The one you're in a relationship with on facebook?
Mike: That's nothing, we only went out a couple of times, nothing's happening!
Jane: Maybe you should tell her that :-)
Fleur: That's disingenuous mate!