The paper explores laughter as a specific psycho-physical mode of expression. It takes its main background from the anthropological philosophy and its notion of man as an eccentric creature. Regarding the topic of the unity of the person with his bodily existence, Helmut Plessners conception ´eccentricity´, is central for this investigation. One presupposition is that laughing, together with crying, when it comes to the nature of expression, are exceptional bodily phenomena, emanating from deep emotional-physical sources. Another is that laughter, in the light of its unique characteristics, might have important things to tell us regarding our being in the world. Bodily phenomenon, like tickling and playfulness can make us laugh, as well as cultural phenomenon like different forms of humor and comedy. But regardless of the setting of what provokes us to laughter, it has its place and its expression in and of the body. 

As a psycho-physical phenomenon, laughter has something to say about our human ambiguity, our existence on the threshold between Körper and Leib, (flesh and body). That is also a focus for this paper. The great full-hearted laughter has a message to the person who laughs. 

Questions are also raised concerning the ability or disability of laughter and what consequences may follow in either case.