A hairstyle associated largely with African-American men who play American football; essentially a mass of long, haphazardly-done braids, it is somewhere between dreadlocks
. Sort of like hockey hair
for black people.
I saw a guy walking down the street the other day. He was about 6'6" in a business suit with a serious case of football hair, and I had to seriously resist the temptation to ask him where he played.