This is a quote from Theodor W. Adorno’s Minima Moralia.
One can find it here in German:
Bei vielen Menschen ist es bereits eine Unverschämtheit, wenn sie Ich sagen.
Or here in English:
With many people, it’s already an exercise in shamelessness, when they say I.
Googling results mostly in this:
In many people it is already an impertinence to say ‘I’.
So what is the nuance of Unverschämtheit? Exercise in shamelessness and impertinence seem to be quite different. In the end of the day, it might be a question for Philosophy, but I’m not sure. There is not a lot of context but I presume one has to understand some Adorno-stuff.