In my comment to one of the other answer:
> *愤世嫉俗 is in Google Translate result for 'cynical'. The fact is -- 愤世嫉俗 is mostly an attitude generated by emotional frustration; while 'cynical' is an egoistic thinking manifest itself in a sarcastic attitude toward the world.* 

I think **尖酸刻薄** (sarcastic / cynical) is a good translation because it only describes the attitude itself, unlike 愤世嫉俗, the motive of being 尖酸刻薄 is unstated.


>[尖酸刻薄][1]

>说话带刺，待人冷酷，不给人丝毫回旋的余地，使人感觉没有人情味

>Speak thorny, treat people cold, do not give the slightest room for maneuver. Give people an impression of no human touch.


  [1]: http://baike.baidu.com/item/%E5%B0%96%E9%85%B8%E5%88%BB%E8%96%84