1. That's the problem with being a boss is that when you are tough, they resent you, and when you are cool, they walk all over you.
2. A person who acts favorably to his or her peers to gain stasis or fancy that will eventually be used to their advantage. Such as a raise, promotion, or acceptance in a group. Usually brown nosers will do anything to gain the approval of their person of choice.
3. Someone who greases up to the boss and acts like he is the bosses best friend in order to get a promotion.