In S04E01 "Spring Break Forever" of Veronica Mars, while Keith & Veronica are having their usual father-daughter banter, he call her out as "Bye Felicia".
VERONICA: I'm gonna Irish exit this wingding. Tell the host it was lame as fuck.
KEITH: Why are you sounding like that?
VERONICA: The struggle is real. Hashtag JOMO.
KEITH: Bye, Felicia.
What is this in reference to? Why did Keith call Veronica as Felicia?
Here's what it means.
When someone says that they're leaving and you could really give two shits less that they are. Their name then becomes "felicia", a random bitch that nobody is sad to see go. They're real name becomes irrelevant because nobody cares what it really is. Instead, they now are "felicia".
A.K.A. it means begone!
It originates from the 1995 comedy film Friday, here's the dialogue.
Felicia: Let me borrow a joint.
Smokey: You need to borrow a job with your broke ass. Always trying to smoke up somebody's shit. Get the hell on Felicia.
Felicia: I'm gonna remember that.
Smokey: Remember it. Write it down. Take a picture. I don't give a fuck!
Felicia: Craig?
Craig Jones: 'Bye, Felisha.
Felicia: Damn. Y'all stingy.
The meme started around 2008.
On December 7th, 2008, Urban Dictionary user pimpin'817 submitted an entry for "bye felicia," describing the phrase as a way to bid farewell to someone who is deemed unimportant. On October 27th, 2011, YouTuber Mamclol uploaded a video titled "Bye Felicia," featuring the clip from Friday with an accompanying hip hop track about the character.
If you want to go more into depth here is a Thesis history of the meme. Bye Felicia - Know Your Meme
