What do you mean by "shameless"

Don't be ashamed to answer. From washing your face, you are not shy and don't blush.

But the specific meaning of this word depends on the occasion and object.

For example, if the relationship between the speaker and the respondent is dull, or they don't know each other at all, then the meaning of this sentence is literally above.

But if the relationship between two people is close, or close, and they say this with a smile, then it is certain that most of them are joking. It's like a woman telling a man that you are too bad.