to make something increase rapidly
Example:
- The team piled on the points in the first half of the game.
- I've been piling on the pounds (= I have put on weight) recently.
to express a feeling in a much stronger way than is necessary
Example:
- Don't pile on the drama!
- Things aren't really that bad—she does tend to pile it on.
to give somebody more or too much of something
Example:
- The German team piled on the pressure in the last 15 minutes.