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.

The GREASY old fat guy
in Facilities Management?
The Big Bang Theory Season 4, Episode 4

HANK:
Squeaky and GREASY.
That's you, my friend.
Breaking Bad Season 4, Episode 5

...with such GREASY hair.
The Big Bang Theory Season 2, Episode 8