From St. Augustine's De Nuptiis et Concupiscentia: 'Original sin lies in man's arrogance and pride; it was committed when Adam ate from the Tree of K… - Slavoj Žižek

The big Other, the symbolic order, with a traumatic element at its very heart; and in Lacanian theory the fantasy is a construction allowing the subject to come to terms with this traumatic kernel. At this level the final moment of the analysis is defined as going through the fantasy [la traversée du fantasme]: not its symbolic interpretation but the experience of the fact that the fantasy-object, by its fascinating presence, is merely filling out a lack, a void in the Other. There is nothing behind the fantasy; the fantasy is a construction whose function is to hide this void, this nothing - that is, the lack in the Other.

I already am eating from the trash can all the time. The name of this trash can is ideology. The material force of ideology makes me not see what I am effectively eating.

The general reference of the philosophical discussion is usually the triangle world: world-language-subject, the relation of the subject to the world of objects, mediated through language.