Gangbusters

outstandingly excellent or successful
https://www.merriam-webster.com/dictionary/gangbusters

originated from the popular radio show of the same name, which aired from 1936 to 1957. The show was a crime drama series that depicted the activities of law enforcement agents as they went after dangerous criminals. The show’s intense and action-packed nature captivated audiences, leading to the phrase “like gangbusters” becoming synonymous with something that is highly successful or explosive in nature.

https://symbolgenie.com/origin-of-the-phrase-like-gangbusters/