ass-kissing

[ as-kis-ing ]
/ ˈæsˌkɪs ɪŋ /

noun Slang: Vulgar.

the practice or an instance of attempting to curry favor by the excessive use of compliments, praise, or the like.
Related formsass-kiss·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019