The origin of the idiom "Roaring success" is not entirely clear, but it is believed to have emerged in the early 20th century, possibly in the United States. The term "roaring" is likely a reference to the sound of a lion's roar, which is associated with strength, power, and dominance.Over time, this phrase has become a popular way to describe a business venture, a performance, or any other endeavor that has been highly successful or achieved great acclaim.