“Hasta la vista, baby” comes from the 1991 film Terminator 2: Judgment Day, where Arnold Schwarzenegger says it as the T-800. The quote became one of the movie’s most repeated catchphrases and spread far beyond film fandom into online edits, soundboards, and reaction memes. It still gets used because the delivery is instantly familiar and the phrase clearly signals a final exit or dismissal. In meme culture, it fills a similar role to nope or FBI open up when a clip needs a sharp, recognizable punchline.