tongue bath

noun3

1. •
   A sexual licking of another's body.

   • If you try giving or receiving a tongue bath, you will notice that it seldom gets completed. — 2005
2. •
   The cleansing of fur by licking, as practised by dogs, cats, etc.

   • Tongue baths do more for cats than help keep them clean. — 2012
3. •
   Sycophantic or obsequious praise.

   • It’s possible that Trump meant to include the URL of Goodwin’s tongue-bath of an article instead of his email address. — 2017