hair that is neither combed nor cut;  a person with dreadlocks

A hairstyle in which the hair naturally or through manipulation is encouraged to matte and form a cylindrical, rope-like pattern. Dreadlocks may take several months to well over a year to form and are considered a permanent style. In order to remove dreadlocks, one must cut them.

Dreadlocks, sometimes called simply dreads or locks, are matted ropes of hair which will form by themselves if the hair is allowed to grow naturally without the use of brushes, combs, razors or scissors for a long period of time. The word itself comes from the Bible and the "dread" of God. People of various cultures have worn dreadlocks.