It's possible that you encountered this phrase in a specific context, like a book, article, or conversation, where it had a particular meaning.
To understand what "moral squint" might refer to, I need more information. Please provide some context:
* Where did you hear this phrase? (e.g., a book, a conversation, a website)
* What was the context? (e.g., a discussion about ethics, a critique of a person's behavior)
With more context, I can help you understand what the author or speaker intended by using "moral squint."