split end

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Football A pass receiver who lines up apart from the rest of the formation.
2. n. The end of a hair that has split into strands.

Wiktionary

1. n. A hair which has split at the end, usually from dryness or innutrition. (Usually in plural)
2. n. American football The position which lines up wide and on the offensive line of scrimmage whose primary job is to serve as a receiver
3. n. American football A player playing the position of split end

WordNet 3.0

1. n. (football) an offensive end who lines up at a distance from the other linemen