The phrase often implies a notable quality compensating for other issues, drawing attention away from negatives. Despite the plot holes, the movie's stunning visuals hide a multitude of sins.
Pro Tip 2/3
Figurative Usage
The 'sins' are not literal but figurative, often referring to faults or mistakes rather than immoral acts. Her diligence in the workplace covers a multitude of sins in organization.
Pro Tip 3/3
Idiomatic Nuance
The phrase adds a humorous or light-hearted tone when acknowledging someone's shortcomings. He's not the best cook, but his enthusiasm covers a multitude of sins.