hit the sack

You can help Wiktionary by providing a proper etymology.

• Audio (AU)

  (file)

hit the sack

1. (idiomatic) To go to bed.
   • 1953, "New Army, Familiar Scenes" (photo essay), New York Times, 18 Jan., p. SM45 (caption):

     K.P. Arches—Like a housewife who spends a day on the range, a soldier gets tired feet and is eager to hit the sack.

• hit the hay
• hit the rack
• turn into a pumpkin
• hit the sheets

• sack out