timeserving; obsequiousness; flattery for personal gain
Rare literary term for sycophantic behavior, currying favor with the powerful. Often used in historical or critical contexts.
I'm fed up with his timeserving attitude.
prostitution of learning; twisting the truth to suit the times
Compound of 阿 (flatter, fawn upon) and 世 (world, society, times). The exact historical derivation is uncertain, but the combination suggests adapting one's behavior to the prevailing social or political winds.