It's an amusing expression of disgust, pronounced with a "ch" sound at the end.
fool or idiot--someone behaving in that fashion. Correction: The literal meaning of 'putz' is slang for male genitalia. The English equivalent is d*ck.
Maven is a Yiddish word for know-it-all.
it means obey
לעבן <-- that means life in yiddishsources:google translate