宰衡

Etymology
Likely as one of the titles he manipulated the Han imperial court to bestow upon himself. The  implies that the title derives from 太宰, a title of the, and 阿衡, variously interpreted as a title, , or personal name of. As a compound, it carries the notation of "to rule; to arbitrate; to make decisions".

Noun

 * 1)  political heavyweight; grandee; a great officer of the state

Usage notes
Due to its association with Wang Mang, it is sometimes used to express veiled or open disgust.