barefaced lie

Etymology
('unconcealed, audacious, shameless') +.

Noun

 * 1) A falsehood told with utter confidence and without trying to conceal the fact that it is false, especially a planned or deliberate falsehood.
 * I understand that salespeople try to explain things in a positive way, but that was a barefaced lie.

Translations

 * Icelandic: haugalygi, ljúga upp í opið geðið á