Being real

My brother is a real mensch:

[A] mensch is someone to admire and emulate, someone of noble character. The key to being "a real mensch" is nothing less than character, rectitude, dignity, a sense of what is right, responsible, decorous. (Rosten, Leo. 1968. The Joys of Yiddish. New York: Pocket Books. 237)

The direct opposite is the un-mensch: ignoble, lacking in character, stench oozing out of the brain, crooked in behavior, undignified in public, no instinct for what is right, irresponsible and enjoying it, hurting people's eyes whenever you show up, dressing inappropriately.

[quote found via Wikipedia]