Search Result for "straight-arm": 
Wordnet 3.0

NOUN (1)

1. (American football) the act of warding off a tackler by holding the arm fully extended with the hand against the opponent; 



WordNet (r) 3.0 (2006):

straight-arm
    n 1: (American football) the act of warding off a tackler by
         holding the arm fully extended with the hand against the
         opponent