err, only not really.
post-modernism is a movement that happened as a reaction to modernism.
here are its main features:
1) intertextuality.
2) disbelief in the "grand narratives" (ie, there is no absolute truth, so it debunks things like the bible)
3) self awareness and referentiality
4) playfullness... ie postmodern texts don't take themselves too seriously, like the person above me said, bold and the beautiful is a good example
5) doesn't believe that one form of art is instrinsically superior to another... ie, it doesn't say "well heart of darkness is harder to understand than, say, wild swans, therefore it is better"
6) often plays with genre and form
7) believes that reality is constructed by language (so in clueless's sense, this would be the visual language of the excesses of mid-90s america)
honestly, post modernism takes a while to really get your head around, and i wouldn't devote too much time to it unless you've already done it in extension one. it only really clicked for me at the end of last term.