WordNet sense 1 (used of hair; thick and poorly groomed):

bushy, shaggy-coated, shaggy-haired

WordNet sense 2 (not neat and smart in appearance):

ungroomed

WordNet sense 3 (having a very rough nap or covered with hanging shags):

shagged

WordNet sense 4 (having or caused by an irregular surface):

rough, unsmooth