c. 1600, "playful;" 1799 as "characterized by conduct constant with that of a sportsman" (as in sporting chance, 1897), present-participle adjective from sport (v.).
Entries linking to sporting
sport v.
c. 1400, "to take pleasure, to amuse oneself," from Old French desporter, deporter "to divert, amuse, please, play; to seek amusement," literally "carry away" (the mind from serious matters), from des- "away" (see dis-) + porter "to carry," from Latin portare "to carry" (from PIE root *per- (2) "to lead, pass over"). Compare disport (v.), which is the older form.
Restricted sense of "amuse oneself by active exercise in open air or taking part in some game" is from late 15c. Meaning "to wear" is from 1778. Related: Sported; sporting.