問好聲姐，很有用的貼，也補充幾個~~

eager beaver: Always busy working like a beaver tirelessly building a dam, which always annoys a lazy bum like me.

boss's pet: As there are teacher's pets at school, there are always boss's pets at work.

backstabber: Steal your ideas, badmouth you behind your back.

brown-noser: You do the work but he/she gets the promotion. The magic tricks up his/her sleeve - currying favor with the boss