have (something) to go

To order something and receive it packaged to be taken out of a restaurant or off of a premises and consumed elsewhere, especially at home. I'll have my coffee to go, thanks. A: "You can take a seat, and we'll bring the food to your table." B: "Actually, could I have it to go, please?" I'm sorry, but I just got called back to work. I'll need my order to go, please.

have to go

1. To be required or obliged to leave. I'd love to stay longer, but I'm afraid I have to go. I have to go if I'm going to make the 5:07 train. Hey, I have to go—please tell Millie I said goodbye, will you?

2. To be necessary to remove. I love the house we bought, but the interior decorating is terrible. This wallpaper has to go! All the junk being kept in the spare office has to go—I'm putting our new hire in there on Monday. They told me there's nothing else they can do. Because the tooth is abscessed, it has to go.

3. euphemism To have a need to urinate. Excuse me, where is your toilet? My daughter really has to go. If anyone else has to go, do it now before we get back on the road—the next rest stop is an hour away. If you have to go, you'll need to get the bathroom key from the reception desk.