'Every man dies.. but not every man really lives.' Mel the Bruce

or

'After the game, the king and pawn go in the same box' .. what do you choose to make your life until then?

Angry or Dismissive doomerism can be a mental defense mechanism, too. Often seems that it is..

Angry or Dismissive doomerism

I prefer the term "ahedonistic nihilism." It has a more pleasingly pretentious ring to it.. :)