Someone looking particularly unattractive, usually early in the morning or late at night. Characteristics include squinty eyes, hair pressed flat against head, puffy features. Usually the result of poor or no sleep and/or way too late/early to be up and moving around.
She washed her face and brushed her hair, but a naked mole rat still stared back at her in the mirror.
After playing video games all night he was more naked mole rat than human.
That's not a baby! That's a naked mole rat!