[ZantaWB]

I put yes for this because I've heard the funny sounding slang phrase 'on fleek' (similar to on point) before, but I'm not sure if it actually is an OED word.

[Kluny]

What are a couple of different ways you would use "fleek" in a sentence? Only, I want to start using it but don't want to sound like a fool.

[earless1]

You must accept that you will sound like a fool just for using this word. You can use it for anything you want to show satisfaction/approval for. React.js on fleek, eyebrows on fleek, uptime on fleek

[ohitsdom]

"Eyebrows on fleek" is definitely most popular, but "uptime on fleek" is now one of my favorite phrases and will be used liberally.

[ZoFreX]

It isn't in the OED yet (I just checked)