The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

I will LITTER the South with Lannister dead.
Game of Thrones Season 2, Episode 1

The cartels,
they LITTER the place
with human heads.
Breaking Bad Season 2, Episode 5

He does five months
picking up LITTER
in an orange jump suit.
Breaking Bad Season 2, Episode 8

What, do I look like
I'm about to drop a LITTER?
Breaking Bad Season 3, Episode 13

...where you're in an orange jumpsuit
picking up LITTER along the highway.
Breaking Bad Season 3, Episode 12