shame·less 
(shāmlĭs)
(shāmlĭs)adj.
1. Feeling no shame; impervious to disgrace.
2. Marked by a lack of shame: a shameless lie.
shameless·ly adv.
shameless·ness n.
Synonyms: shameless, brazen, barefaced, brash1, impudent, unblushing
These adjectives apply to that which defies social or moral proprieties and is marked by a bold lack of shame. Shameless implies a lack of modesty, sense of decency, or regard for others' rights or feelings: a shameless liar; a shameless accusation. Brazen suggests flagrant, insolent audacity: a brazen impostor; brazen arrogance. Barefaced specifies undisguised brazenness: a barefaced hypocrite; a barefaced lie. Brash stresses impetuousness, lack of tact, and often crass indifference to consequences or to considerations of decency: a brash newcomer; brash demands. Impudent suggests offensive boldness or effrontery: an impudent student; an impudent misrepresentation. Unblushing implies an inappropriate lack of shame or embarrassment: an unblushing apologist; unblushing obsequiousness.
These adjectives apply to that which defies social or moral proprieties and is marked by a bold lack of shame. Shameless implies a lack of modesty, sense of decency, or regard for others' rights or feelings: a shameless liar; a shameless accusation. Brazen suggests flagrant, insolent audacity: a brazen impostor; brazen arrogance. Barefaced specifies undisguised brazenness: a barefaced hypocrite; a barefaced lie. Brash stresses impetuousness, lack of tact, and often crass indifference to consequences or to considerations of decency: a brash newcomer; brash demands. Impudent suggests offensive boldness or effrontery: an impudent student; an impudent misrepresentation. Unblushing implies an inappropriate lack of shame or embarrassment: an unblushing apologist; unblushing obsequiousness.