split end

Short definition from Wiktionary

Noun

1. 1
   A hair which has split at the end, usually from dryness or poor nutrition.
2. 2
   The condition of having hairs with split ends.
3. 3
   The position which lines up wide and on the offensive line of scrimmage, whose primary job is to serve as a wide receiver.
4. 4
   A player playing the position of split end.