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.

What’s that FREAK doing?
Money Heist Season 1, Episode 13

l just said that so Marie
wouldn't FREAK. Here.
Take a right here.
Breaking Bad Season 4, Episode 8

Yeah. Howie's gonna FREAK out.
The Big Bang Theory Season 5, Episode 16

Whose head are you going
to blow now, eh, FREAK?
Money Heist Season 1, Episode 9

...as a hideous disfigured FREAK.
The Big Bang Theory Season 8, Episode 9