Specifically, in heraldry, said of an arm, a leg, or other bearing, bent naturally. Also flect, flectant, flected.
Word Usage
"But Kiffin flexed his muscles in recruiting — pulling in the No. 1 ranked class, according to Rivals. com — so there is enviable talent on hand as the Trojans try to reclaim the Pac-10 title after they went 5-4 in conference games, tied for fifth."