bald-faced

Bald-faced describes something done openly and shamelessly, without any attempt at concealment or subtlety.

A bald-faced lie is one told brazenly, as if the liar doesn't care whether you believe them.

The term likely derives from having an uncovered face—nothing to hide behind.

In North America, bald-faced also describes animals with white markings on their faces, such as the bald-faced hornet.