Chairo (feminine chaira) is a pejorative epithet that originated in Mexico to describe an individual who holds a far-left ideology, specifically any person who thoughtlessly defends, idolizes, and fawns over a populist politician and demagogue with an attitude similar to that of a religious fanatic.
Similar terms in other Spanish-speaking countries include perroflautas in Spain, zurdos in Argentina and comunachos in Chile.[1]