suck up to

suck up to idiom
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. [Vulgar slang; mid-1800s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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