whistle blower 爱打小报告的人
It is a type of person who would tell your boss on you if you did something wrong.
这是指当你做错了事，就会向上级打小报告的人。

kiss ass 马屁精
It's obvious Ted is a kiss ass. Look at how he ignores the rest of us.
很明显 Ted 就是一个马屁精，你看看他完全没把我们剩下这些人放在眼里。

the "I am so funny" guy/girl
自以为有趣的人

the complainer 爱抱怨的人
Jane is turning to the office complainer,Jeez!
Jane已经要变成办公室抱怨狂了，天哪！

the bully 霸凌者
The bully will go to extreme lengths to hurt you.
办公室霸凌者会想方设法来伤害你。

the frenemy 亦敌亦友的人，塑料姐妹花
I never expected her to become my frenemy.
我从来没有想到她和我之间的友情居然如此虚假！