alligator arms n.pl.— «Some of the best players in the NBA have developed “alligator arms”— sports parlance for not extending the arms—under the pressure of big free throws.» —“The fine art of shooting free...
alligator arms n.pl. in American sports, especially football, arms that are not sufficiently extended to catch a ball; generally, short arms on a player. (source: Double-Tongued Dictionary)