Used informally to describe attraction to someone rugged or unrefined who's however appealing.

Colloquial Charm

Commonly understood in the UK and may not be well-known elsewhere or could be misinterpreted.

Cultural Nuance

Can imply a playful, positive view of someone who otherwise might be seen negatively.

Refers to a brief, not overly serious problem or period of difficulty.

Often spoken about in sports to discuss periods when things don't go as planned.

The phrase is metaphorical and doesn't mean actual rough objects or terrain.