What does its ruddy marvelous mean?

The phrase "its ruddy marvelous" is a British expression that means "it is very good" or "it is excellent." It is often used to describe something that is unexpected or surprisingly good. For example, someone might say "That meal was ruddy marvelous!" to express how much they enjoyed it. The phrase can also be used sarcastically or ironically to describe something that is not very good at all. For example, someone might say "This weather is ruddy marvelous!" to express their frustration with the rain or the cold.