"What happens if the Immovable Object meets the Unstoppable Force?"
I'd say what happens is that we find out which of the two has been most incorrectly described as 'unstoppable' or 'immovable'.
Words are tricky things - but the map is not the territory
imo the 'meaning of life' is to be alive - the irony being that too much discussion / analysis about this has a danger of leading us further away from the thing we are trying to understand.
Funny old world...