Pay court to somebody
Definition 1 of 2
Pro Tip 1/3Social Climbing
The phrase often implies someone is flattering a superior for personal gain or advancement. 
Juliane paid court to the company director, laughing at all his jokes.
Pro Tip 2/3Strategic Flattery
Using 'pay court to' can suggest a calculated effort to influence someone with authority. 
Mark paid court to the lead investor at every meeting.
Pro Tip 3/3Perception of Insincerity
The phrase may carry a negative tone, implying insincere or opportunistic behavior. 
As she paid court to her wealthy aunt, her cousins rolled their eyes.