Definitions by Rowdy Librarian

Fill-ratio 

When you are out to eat at a restaurant that has free refills on your drink. If your server keeps your glass full, the server has a high fill-ratio. If the server ignores you and leaves you thirsty, the server has a low fill-ratio.

A takeoff of “kill-ratio”

Our waiter’s fill-ratio is pathetic—he hasn’t come by once.

Fill-ratio by Rowdy Librarian January 27, 2020