slouch over

slouch over

To allow one's shoulders and head to slump, droop, or hunch forward or to one side. You need to stop slouching over like that while you work at the computer, or you'll give yourself major back pain down the line! Everyone in the meeting had started to slouch over, their eyes glossing over out of sheer boredom.
See also: over, slouch
Farlex Dictionary of Idioms.

slouch over

to lean or crumple and fall to one side; [for someone] to collapse in a sitting position. He slouched over and went to sleep in his chair. When he slouched over, I thought something was wrong.
See also: over, slouch
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • slump over
  • slouch down
  • hunch up (one's)/the shoulders
  • hunch (one's)/the shoulders up
  • head and shoulders above, to be
  • slouch behind
  • slouch behind (someone or something)
  • hunch up
  • hunch
  • a hunch
References in periodicals archive
If you're hitting a parent up for extra privileges, don't slouch over with your head down.