"Hath egg one face" is an idiom that means to be two-faced or deceitful. Synonyms for this phrase include "double-crossed," "hypocritical," "insincere," and "deceitful." These words all convey the same meaning of someone who is not honest or trustworthy in their dealings with others. Other synonyms that can be used to describe someone who is two-faced include "disingenuous," "false," "phony," "fake," and "duplicitous." When using these words, one should be careful to ensure that they are appropriate for the context in which they are used and do not come across as offensive or insulting to the person being described.