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.

Guys, if I wanted to hear people be BITCHY,
I'd go to my real salon.
The Big Bang Theory Season 8, Episode 18

If my blood sugar drops
and I get BITCHY, it's on you.
The Big Bang Theory Season 12, Episode 23

Ooh, somebody's been
taking BITCHY pills.
The Big Bang Theory Season 4, Episode 3

Maybe you should've called it
The Bitchy Little Astronaut.
The Big Bang Theory Season 12, Episode 18