To flatter and cajole someone; curry favor with someone; brown-nose, suck ass: He gets ahead by sucking up to the mayor/ They are boss kisser-uppers. They kiss up to the boss(entry form 1860+, variant 1990s+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with suck up to
suck up to
Behave obsequiously towards, ingratiate oneself with, as in Now that he's the boss they're all sucking up to him, hoping to get big raises.
[ ; mid-1800s