The term 'unruly hairdo' can be described by three crossword solutions: SHAG (4 letters), MOP (3 letters), and MANE (4 letters). A shag is a hairstyle characterized by layers of choppy, uneven hair. It is often associated with the 1970s and is usually worn in a messy, unkempt manner. A MOP is a hairstyle that is short on the sides and longer on top. It is often styled with a comb or brush to create a neat, uniform look. Finally, a MANE is a long, thick hairstyle that is usually associated with wild animals such as horses and lions. It is often worn in an unruly fashion, with the hair falling down the back and sides of the head. All three of these styles can be used to describe an unruly hairdo.