what does Rawr mean in text?

[KelHATESorangesoda]

I just want to know you're opinion on what it means then I'll tell u why.
just if u said rawwr randomly in a text message
Thank you lol. well I said it because I was socially awkward and I didn't know what to say so I was like..... rawr...??
Then I mentally slapped myself all wtf did u do that for?

[Jon]

ROAR.. That's it.. Just a dumb expression like a lion roaring..

Why do people say it randomly? I don't know, because they're socially awkward or just not right in the head when they think saying it randomly is cool perhaps?

[Ken]

Not cooked