go hat in hand to (someone)

To ask someone for help, often monetary, with embarrassment. Primarily heard in US. I guess I'll just have to go hat in hand to my parents for help paying my rent this month. It's amusing seeing the governor have to go hat in hand to the state in order to get his budget requests approved. I sure made a big mistake blowing my life savings on that stupid business venture. Now I have to go hat in hand to my parents and ask them to lend me some money.

hat in hand, to go/with

To behave submissively or obsequiously; to plead for something (pardon, a favor, and the like). The term alludes to the old custom of removing one’s hat as a sign of respect. “A man’s hat in his hand never did him any harm,” wrote Samuel Palmer (Moral Essays on Proverbs, 1710). The custom of wearing and doffing a hat has become far less common, so the term is dying out, but it is still used in diplomatic circles.