eyebrowl
A rare, recessive X-linked genetic anomaly most commonly seen in trailer park inhabitants. The result is one eyebrow permanently raised creating a look of constant scowling, or disappointment. It is endemic in rural villages and the deep south, and exacerbated by family inbreeding.
Andrew: "Yo, look at Butch! He always looks so pissed off. Whats up his ass?"
Amanda: "Oh. That's just his eyebrowl."
Amanda: "Oh. That's just his eyebrowl."