Here's why it's unlikely to be from Hamlet:
* No direct correlation: The phrase "mad north-north-west" doesn't appear in any known edition of Hamlet.
* Hamlet's themes: The play explores themes of revenge, madness, mortality, and the nature of reality. This phrase doesn't align with any of those themes.
Possible Misunderstandings:
* Misremembered Quote: You might be thinking of a different Shakespearean play or a quote with a similar structure.
* Modern Adaptation: Some modern adaptations or interpretations of Hamlet might have included this phrase for dramatic effect.
Can you provide more context? If you recall where you heard this phrase, it might help to identify the source.