Instruction: What does troll the respawn, Jeremy mean?

Response: Trolling the respawn refers to when in video games a player hangs out at a place where their opponent respawns, or comes back into a game after dying to immediately kill them again. Troll the respawn, Jeremy specifically is a quote from a TV show Unbreakable Kimmy Schmidt and is misunderstood as a greeting one says when hanging up the phone.