In the process of leaving.
Quick! She's already on the way out!
As someone is leaving.
He shook my hand on the way out.
(informal) Going out of fashion.
(informal, euphemistic) Dying.
Source: en.wiktionary.orgI feel that education needs an overhaul - courses are obsolete and grades are on the way out. Kent McCord
These wars appear also to have given its death blow to colonialism and to imperialism in its colonial form, under which weaker peoples were treated as possessions to be economically exploited. At least we hope that such colonialism is on the way out. Emily Greene Balch
Granted, not really a joke, but how often do you get a mic in your hand? You know? So. I am sorry but don't anybody trip on my soap box on the way out. Don't anybody trip over that. And the chip on my shoulder's a little heavy. I have back problems now. Janeane Garofalo
Once you lose that sense of wonder at being alive, you're pretty much on the way out... David Bowie
The question rather is how we should do science and theology in light of the impending collapse of Enlightenment rationalism and scientific naturalism. These ideologies are on the way out. They are on the way out. William A. Dembski
I really thought I was on the way out. My husband Blake saved my life. Often I don't know what I do, then the next day the memory returns. And then I am engulfed in shame. Amy Winehouse