Having long, thick, and unkempt hair or fur. The shaggy dog ran through the park, its fur blowing in the wind.
Rough and untidy in appearance. He wore a shaggy sweater that looked like it hadn't been washed in weeks.
Covered with, or consisting of, long coarse hairs, scales, or fibers, especially in botanical or zoological description. The stem of the mushroom was shaggy with delicate white threads.