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.

desperate and CREEPY.
The Big Bang Theory Season 7, Episode 17

this is not my first
CREEPY phone call.
The Big Bang Theory Season 12, Episode 16

No, stalkers are CREEPY.
The Big Bang Theory Season 9, Episode 8

Kidnap Bernadette from the opera
wearing a CREEPY mask...
The Big Bang Theory Season 4, Episode 4

CREEPY VOICE:
Sheldon...
The Big Bang Theory Season 5, Episode 7