from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. Informal To curry favor with in an obsequious manner; fawn on.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One who brownnoses; one who sucks up; a bootlicker, ass-kisser, sycophant.
- v. To flatter someone (especially a superior) in an obsequious manner, and to support their every opinion
From the image of an obsequious person whose nose becomes soiled in kissing the rump of someone from whom favor is sought.(American Heritage® Dictionary of the English Language, Fourth Edition)