Wookiee hair is a term used by people when they are in need of a hair cut or are having a bad hair day. The term wookiee is derived from the popular fictional Star Wars universe race who are completely covered in hair, hirsute bipeds. The most notable Wookiee is Chewbacca. The term Chewbacca hair or rat's nest may also replace wookiee hair.
I was talking to Vincent and he said: "Holy fuck, I have a job interview today, I got a hair cut because I looked like I had wookiee hair".