pickthank

/ˈpɪkˌθæŋk/
noun
  1. A person who tries to win favor by flattering or doing small favors; a sycophant.
    • Nobody trusted the pickthank at the office because his praise never seemed sincere.
    • In the old tale, the pickthank whispered compliments to the king to gain power.
    • The manager's assistant was a pickthank who always agreed with everything she said.