The protective layer of pillow that can be found between extra knobby-knees.
The Knee-Horse is the horse that sits between your knees at night and you ride it through your dreams!!
When someone has long, skinny legs and a big ole kneecap that looks awkward and disproportionate. Typically seen in adolescents and preteens but may persist into adulthood in select cases.
Damn, looks at that girl’s horse knees! Lol!