Kurt Vonnegut is a postmodern marvel. His heart-wrenching novel Slaughter house-5 is about World War II and its horrors, and how Kurt Vonnegut uses black humor to circumvent the tragic horror of war is the main theme of this article. It is an attempt to show that Kurt Vonnegut is a postmodern scribe employing all forms of satire especially grotesque humor which puts horror and humor side by side. This article tries to show that Kurt Vonnegut with his postmodern philosophy uses the conventional satirical tools like parody, irony and burlesque and the unconventional instruments like the black humor and Metalanguage. This article emphasizes his perspective on the ills of modern warfare and the socio-political injustices that are heaped upon the meek and the un-protesting common man on the street. We understand post structuralism and postmodernism are in fact two sides of a new critical literary thought. This article tries to show that Kurt Vonnegut may have a change of heart from being a mute spectator to man`s suffering to a difficult kind of literature which will have something to say against the destabilizing forces of nature. In this article, it is highlighted that the reader has a greater role to play in the text than the author himself as postulated by Barthe as ‘the death of the author.’