fawn on

fawn (up)on (one)

To flatter and fuss over one to an excessive degree, especially in a sycophantic or obsequious manner. Any time that famous singer comes here, people can't help themselves— they just start fawning upon her. You're not going to get ahead by fawning on the boss like that. She really hates brown-nosers.
See also: fawn
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

fawn (up)on someone

Fig. to praise and flatter someone. Aunt Mabel fawned on the new baby till the poor child was rescued by her mother. I hate the way our aunts fawn on us at family gatherings.
See also: fawn, on
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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