Senses
明目张胆/ 明目張膽 brazenly
Describes doing something bad openly and without any fear or hesitation; flagrantly.
明目张胆/ 明目張膽 fearlessly
(archaic) To be bold and courageous in the performance of one's duties; having the courage of one's convictions.
明目张胆/ 明目張膽 with eyes wide open
To open one's eyes wide and bolster one's courage (the literal meaning of the components)