tell-all（adj.）
of biographies, etc., "revelatory, tending to disclose details of private life," 1959, from the verbal phrase, which was used by 1910 in headlines, etc., for "tell all that one knows, reveal the details;" see tell (v.) + all.
Fall Willing to 'Tell All', But Only in 'Proper Way' [headline from Teapot Dome scandal story in Charlotte (N.C.) News and Observer, March 22, 1928]
该词起源时间：1959年