Gound

Typical terms invented to fill this vacuum include sleepies, eye-snot, and bed-boogers. The correct word, however, is gound. "Collin was never one to dillydally in the morning: by the time he had rubbed the gound out of his eyes he was usually on his third Manhattan."

Your eyes get dried mucus in them while you sleep. The stuff is sometimes called bed-boogers or eye-snot, but to be accurate, it is "gound".

Your eyes have their own goo, too. You know that crud in the corners of your eyes when you first wake up? It's a type of rheum called gound. When you're awake, you blink away the gound.

While you sleep, however, your rheum bundles detritus such as dust, blood cells, skin cells, and mucus into gound, the gummy yellow-y stuff sometimes known as “sleep” […]