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.

with an "Ask me about my
grandchildren" BUMPER sticker,
The Big Bang Theory Season 5, Episode 13

We are next to a Suburu with
a Gore/Lieberman BUMPER sticker.
The Big Bang Theory Season 5, Episode 13

Plus, they got BUMPER boats, so...
Breaking Bad Season 3, Episode 11

You got your BUMPER cars over there
down that way.
Breaking Bad Season 3, Episode 13