What does it mean in other words?
of the whole matter.

THE CONTEXT:

Did you run into the wall?”

“Don’t ask me,” said Owl Eyes, washing his hands of the whole matter.

Question

What does it mean in other words?
of the whole matter.

THE CONTEXT:

Did you run into the wall?”

“Don’t ask me,” said Owl Eyes, washing his hands of the whole matter.

Answer

washing his hands of the whole matter means, that he no longer wants anything to do with the situation. He is putting it all behind him and moving on.