To outright lie in the face of contradictory facts or evidence, or to be inept at your job.
If you were to say the earth was flat you'd be telling a Binger. The worker at the fast food joint not only forgot my straw but gave me the wrong sandwich, what a Binger
A bold face lie delivered with a straight face in light of contradicting physical evidence
To say the earth is flat is to tell a Binger