litter up

litter (something or some place) up

To make something or some place very messy or untidy. I hate the way he litters up his desk with papers and dirty plates—it just looks really unprofessional. The room wasn't clean for more than an hour before the kids had littered it up with toys and bits of food.
See also: litter, up
Farlex Dictionary of Idioms.

litter something up

to mess something up with litter, trash, possessions, etc. Who littered this room up? Who littered up this room?
See also: litter, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • litter
  • litter (something or some place) up
  • like something the cat brought in
  • like something the cat brought/dragged in
  • like something the cat dragged in
  • look like something the cat brought in
  • look like something the cat dragged in
  • look like the cat dragged in
  • strew (someone or something) with (something)
  • strew with
References in periodicals archive
"Those who clean litter up, the local authorities staff, the road operators and the volunteers are not to blame.
Do us a favour and pick up your litter; DO YOUR BIT Plea to motorists during clean-up campaign