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.

It's a PROP from a movie
and we're kind of fighting over it.
The Big Bang Theory Season 3, Episode 17

We're here in the PROP room
on the stage.
The Big Bang Theory Season 12, Episode 24

Well, I think the most
memorable PROP that we have
The Big Bang Theory Season 12, Episode 24

It would be a replica
of a movie PROP.
The Big Bang Theory Season 5, Episode 5

...is a PROP from a movie
and I don't even get to keep it?
The Big Bang Theory Season 3, Episode 17