Your purpose is just a placeholder until life's True Meaning shows up late.

This quote suggests that the quest for purpose is often a temporary fix, filling a void while waiting for an elusive, deeper meaning to reveal itself. The humour lies in the idea that life’s grand answers are perpetually delayed, leaving us with a sense of incompleteness.

It highlights the absurdity in expecting concrete answers about our existence, while subtly mocking the notion that there might ever be a single 'True Meaning.' As we hold out for profound revelations, we're left with the ironic realisation that our placeholder purposes might be all that’s on offer.