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.

...he would giggle and say,
"Oh, boy, my BREAST friends."
The Big Bang Theory Season 4, Episode 19

We will. Got my dancing shoes,
got my BREAST pump. Let's party.
The Big Bang Theory Season 10, Episode 15

I fed her at my own BREAST
Game of Thrones Season 7, Episode 3

Swaddled them, rocked them,
fed them at her own BREAST.
Game of Thrones Season 4, Episode 1

It's my sister-in-law's BREAST.
Oh, you are so provincial.
Breaking Bad Season 2, Episode 12