The Brief: The phrase "Bye, Felicia" is a way to say goodbye to someone while indicating that you don't care about them and are glad to see them leave.

DEEP DIVE
“Bye, Felicia” can also mean “good riddance.” The phrase originated from the 1995 stoner comedy crime film Friday, starring and co-written by Ice Cube. It was popularized by the queens on Ru Paul’s Drag Race.
Jordan Sparks’s first mixtape is titled #ByeFelicia.
DO NOT THREATEN TO UNFOLLOW me. JUST DO IT! What’s the point of writing me ? I don’t need a warning and I’m not your Employer so there is no need to put in a two weeks notice. BYE FELICIA
— Terrence K. Williams (@w_terrence) November 12, 2018