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.

Like a baby SNAIL peeking out of its shell.
Game of Thrones Season 4, Episode 8

Stealing SNAIL mail, very old school.
I like it.
The Big Bang Theory Season 1, Episode 3

I can go so slow it'll be like
there's a SNAIL in your mouth.
The Big Bang Theory Season 5, Episode 15