Most show-me is an informal expression that means someone who is overly skeptical or demands more proof than necessary. Synonyms for this term include doubting Thomas, skeptic, cynic, unbeliever, and skeptic. A doubting Thomas is someone who requires evidence before accepting a claim, just like the apostle Thomas from the Bible. A skeptic is someone who doubts the truth of a claim and demands evidence, while a cynic is someone who believes that people are motivated purely by selfish interests. An unbeliever is someone who does not believe in a particular religion or concept, while a skeptic questions the validity of an argument or claim. This type of person is often seen as negative, but can also be viewed as someone who challenges conventional thinking.