hold-out (n.) Look up hold-out at Dictionary.com
also holdout, one who abstains or refrains when others do not, by 1911, from verbal expression hold out, which is attested from 1907 in the sense "keep back, detain, withhold" (see hold (v.) + out (adv.)). Earlier as the name of a card-sharper's device (1893). The verbal phrase is attested from 1520s as "stretch forth," 1580s as "resist pressure."