cynic

noun

• 1a person who believes that people are motivated purely by self-interest rather than acting for honourable or unselfish reasons:some cynics thought that the controversy was all a publicity stunt
• a person who questions whether something will happen or whether it is worthwhile:the cynics were silenced when the factory opened

• 2 (Cynic) a member of a school of ancient Greek philosophers founded by Antisthenes, marked by an ostentatious contempt for ease and pleasure. The movement flourished in the 3rd century bc and revived in the 1st century ad.