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.

Whenever we see an ICEBERG,
we take a shot!
The Big Bang Theory Season 7, Episode 1

Iceberg!
The Big Bang Theory Season 7, Episode 1

if it hit an ICEBERG,
countless men would perish.
The Big Bang Theory Season 7, Episode 24

Oh...
That's just the tip of the sadness ICEBERG.
The Big Bang Theory Season 6, Episode 8