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.

All right, maybe
it's a little FLASHY,
but he needed a car,
Breaking Bad Season 4, Episode 6

...with your FLASHY clothes
and your Woody Allen swagger.
The Big Bang Theory Season 6, Episode 24