1660s, via French attitude (17c.), from Italian attitudine "disposition, posture," also "aptness, promptitude," from Late Latin aptitudinem (nominative aptitudo; see aptitude). Originally 17c. a technical term in art for the posture of a figure in a statue or painting; later generalized to "a posture of the body supposed to imply some mental state" (1725). Sense of "settled behavior reflecting feeling or opinion" is first recorded 1837. Connotations of "antagonistic and uncooperative" developed by 1962 in slang.