Source : Webster's Revised Unabridged Dictionary (1913)

Shaggy \Shag"gy\, a. [Compar. {Shaggier}; superl. {Shaggiest}.]
   [From {Shag}, n.]
   Rough with long hair or wool.

         About his shoulders hangs the shaggy skin. --Dryden.

   2. Rough; rugged; jaggy. --Milton.

            [A rill] that winds unseen beneath the shaggy fell.
                                                  --Keble.

Source : WordNet®

shaggy
     adj 1: used of hair; thick and poorly groomed; "bushy locks"; "a
            shaggy beard" [syn: {bushy}]
     2: having a very rough nap or covered with hanging shags;
        "junipers with shagged trunks"; "shaggy rugs" [syn: {shagged}]
     [also: {shaggiest}, {shaggier}]

shaggiest
     See {shaggy}