not ashamed, especially about something generally considered unacceptable

She is completely shameless about her ambition. 她对自己的野心全然不知羞耻。

They seem to have a shameless disregard for truth. 他们似乎恬不知耻地无视事实真相。

behaving in a way intended to attract sexual interest, without feeling ashamed about it

She's a shameless hussy. 她是个厚颜无耻的荡妇。