So a while ago on the Dr. Phil show, there was a young woman by the name of Danielle who had a weird and affected accent that could in no way be real.
What really interested the internet wasn't the girl's erratic behavior in the video, but a weird catchphrase she shouted during the program as a response to the audience laughing at her.
Due to it's strangeness/hilariousness/absurdity, it became an internet meme.
The girl, Danielle, is attempting to say, "Catch me outside, how about that?" As a challenge to those who laugh at her. This phrase implies that if someone were to see her in the streets then they would be sorry, for Danielle would smite them.
On a Spirit Airlines flight from Los Angeles to Ft. Lauderdale, the classiest of all places, Danielle got into a spat with a fellow passenger. The mush-mouthed teen looks like she's trying to ride the wave of her viral fame by being active on social media and/or maybe instigating or staging fights to keep her relevant in the meme world. Which is the only world that truly matters. Howbow dah?