abashless
adj.feeling no shame or embarrassment, even in situations where most people would feel shy or guilty. It describes someone who acts boldly and does not care about being judged.
adj.devoid of shame or embarrassment; characterized by a lack of modesty or self-consciousness. Primarily literary in register and often carries a connotation of bold or defiant confidence.
“He gave an abashless performance in front of the large crowd.”
“The politician offered an abashless defense of his controversial policies despite the public outcry.”
“Her abashless disregard for social conventions made her a polarizing figure in the conservative circles of the nineteenth century.”
Typically used to modify nouns describing people, their behavior, or their expressions.
From abash + -less.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.