OED: 1943 1941 _Antelope_ (Kearney, Neb.) (Dec. 19) 4: By that time we are ready to hit the "sack," as a bed is called in the navy. JL -- "If the truth is half as bad as I think it is, you can't handle the truth." ------------------------------------------------------------ The American Dialect Society - http://www.americandialect.org