grovel before (someone)
To interact with someone in an overtly agreeable or deferential manner. The phrase can also specifically refer to the act of prostration. Well, if your mother's mad at me, I guess I'm going to have to grovel before her—we want this family dinner to be pleasant, after all. Get down and grovel before your king.
grovel before someone or something
to prostrate oneself before someone or something. The prisoner groveled before his accusers. The peasant groveled before the lord of the manor.