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.

Okay, if I'm not allowed to be SNIDE,
you're not allowed to be condescending.
The Big Bang Theory Season 2, Episode 18

Undoubtedly yet another SNIDE response
to my repeated letters...
The Big Bang Theory Season 3, Episode 16

Priya just made a SNIDE comment
about your acting career.
The Big Bang Theory Season 4, Episode 22

And you're not allowed to be sarcastic
or SNIDE to me while I'm doing so.
The Big Bang Theory Season 2, Episode 18

Say something SNIDE.
Game of Thrones Season 8, Episode 4