1. That guy is a real bootlicker.

2. That guy is a ture bootlicker.

3. She is a bootlicker.

4. This bootlicker is really despicable as he is always stabbing others in the back.

5. I disgust to be a bootlicker. And it almost becomes a fatal defect for improvement and promotion in this kind of society.

6. He got the promotion just because he was a bootlicker to the higher-ups.