Student or Learner
I heard this expression in an internet podcast,(...a bald-faced lie...)I understand it, but then the speaker says that the idea is that people with beard and moustaches might be dishonest!!!!!Because they try to hide something using the hair, and that there is a saying that says: "Never trust a man in beard"...Is this true?
The person who said that is either teasing you or is nuts.
There is some thought that way back when the term was coined, many men did have beards, and perhaps it's easier to disguise the fact that you are lying if parts of your face are concealed. The other sites I read said that it's more likely referring to the masks the the upper-class may have worn to parties, and it's easy to lie from behind a mask.
If you can lie with a bare face (a barefaced lie = bald-faced lie), you can lie without any shame at all.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.