Any closed-minded or pretentious individual belonging to a certain expertise (Ex: artist). This type of person praises tradition in an unhealthy way (and thinks it IS the only way to do things). This type of person is also known for putting down anyone who doesn't see things his/her way, usually with very hateful words. He/she often put other people in his/her position and gains satisfaction when agreed with.
That art critic is was a stupid Mokuu.