Self-depreciating

«"The way you disapprove of your life! Why do you do that? It is of no value for a man to disapprove of his life the way you do. You seem to take some special pleasure, some pride, in making yourself the butt of you own peculiar sense of humor. I don't believe you actually want to improve your life. Everything you say is somehow always twisted, some way or another, to come out 'funny.' All day long the same thing. In some little way or other, everything is ironical, or self-depreciating. Self-depreciating?"
"Self-deprecating. Self-mocking."»

Portnoy's complaint, Philip Roth