shaggiest
Webster's Dictionary (GCIDE)
Shaggy \Shag"gy\, a. [Compar. Shaggier; superl. Shaggiest.] [From Shag, n.] Rough with long hair or wool. [1913 Webster]
About his shoulders hangs the shaggy skin. --Dryden. [1913 Webster]
2.Rough; rugged; jaggy. --Milton. [1913 Webster]
[A rill] that winds unseen beneath the shaggy fell.— Keble.[1913 Webster]