I can run Sublime, for example, in the background by typing

sublime-text &

The & puts it into the background so that I can continue to run commands in my terminal. Alternatively, I can run

sublime-text

Which locks up my terminal. If I then press Ctrl+Z it "suspends" the application which essentially freezes it (it will eventually turn gray). Typing bg moves it into the background and unlocks the terminal.

In any case, if I exit the terminal or type fg and then Ctrl+C, the application will close.

How do I "disconnect" the GUI application from the terminal so that it will not close should I close the terminal or press Ctrl+C? In other words, I would like to use the terminal as a launcher, which is particularly convenient when I want to open a specific file: e.g., sublime-text /path/to/my/file <super-secret-character-that-disconnects-the-app-not-just-puts-it-in-the-bg>.