A/the something to end all sths
Definition 1 of 1
Pro Tip 1/3Hyperbolic Nature
The phrase often exaggerates to emphasize how extreme something is. 
That was the meal to end all meals, I've never eaten so much!
Pro Tip 2/3Context Importance
Best used among people familiar with the subject for greater impact. 
To the gamers, it was the championship to end all championships.
Pro Tip 3/3Cultural Resonance
The phrase may reference historical events, like 'the war to end all wars' for World War I. 
They promoted the treaty as the deal to end all conflicts.