The line comes from the animated series SpongeBob SquarePants, which premiered on Nickelodeon in 1999, where Patrick Star often answers the phone at the Krusty Krab restaurant. His reply, No, this is Patrick, turned the exchange into a long running meme that spread through forums, YouTube edits and soundboards. People still quote the opening question on its own because it instantly sets up the joke, signals a confused phone call, and works even without the punchline for anyone who grew up with the show.