While searching for wedding attire, originally deciding on morning dress (before the ceremony was moved to later in the day) I discovered that not a few companies call the morning coat/cutaway coat "Tuxedo Tails", and that they also call the "white tie" tailcoat "Tuxedo Tails".
Moreover, on a somewhat related note, the Homburg hat is sold on the Internet as the "Gangster" or "Godfather" hat. Given how the fedora was named, that almost makes sense.
Jacques Barzun considered the turning away from more prescribed forms of dress a symptom of a broader culture of "emancipation". What does one call "Tuxedo Tails" and "Godfather hat"? That doesn't seem to be the word for it.