littering

/L IH1 T ER0 IH0 NG/
verb
  1. 1

    To drop or throw trash without properly disposing of it (as discarding in public areas rather than trash receptacles).

    โ€œBy tossing the bottle out the window, he was littering.โ€

  2. 2

    To scatter carelessly about.

  3. 3

    To strew (a place) with scattered articles.

  4. 4

    To give birth to, used of animals.

  5. 5

    To produce a litter of young.

  6. 6

    To supply (cattle etc.) with litter; to cover with litter, as the floor of a stall.

  7. 7

    To be supplied with litter as bedding; to sleep or make one's bed in litter.

noun
  1. 1

    The dropping of litter.

Source: https://en.wiktionary.org/wiki/litter, https://en.wiktionary.org/wiki/littering