Word Origin & History
sack"to plunder," 1549, from M.Fr. sac, in the phrase mettre à sac "put it in a bag," a military leader's command to his troops to plunder a city (parallel to It. sacco, with the same range of meaning), from V.L. *saccare "to plunder," originally "to put plundered things into a sack," from L. saccus
EXPAND"bag" (see
sack (n.1)). The notion is probably of putting booty in a bag. This is the root of the verb in the U.S. football sense (1969).
COLLAPSE