pourboire

For instance, the French term for a gratuity, he noted, is “pourboire,” or roughly translated, “for drink.”

At length we reached a lonely farmhouse, at which, he implied, we were to alight; and we paid him his little bill, with the addition of a small pourboire.

"Do you want to give me a lift with the biggest pieces?" asked the messenger; "my orders are to give you a good pourboire."

It’s not the custom at Geneva to give a pourboire for so short a drive. 

But he, glaring at me with his dim eyes, remarked, sneering, "So you want a pourboire because you have supported your sick mother and not poisoned your brother?"