hat-tip

Updated: May 8, 2025

Then he said, "Pardon me," and proceeded to cut a neat circle of red tissue paper; daintily notched the edges of it; took the mucilage and pasted it in my hat so as to cover the manufacturer's name. He said, "No one will know now where you got it. I will send you a hat-tip of my hatter, and you can paste it over this tissue circle."

Mark Twain - Alonzo Fitz and Other Stories