Someone who ghosts someone else aka stops communication with them without reason or justification even after attempts by the other person to continue conversing.
"Hey you still talk to Tina?" - Person 1
"Nah she's a fuckin ghostie" - Person 2
"Really? wtf happened???" - Person 1
"I dunno? She just stopped returning my texts outta the blue! I don't fucking know why!" - Person 2
"Wow what a fuckin ghostie" - Person 1