When Uncle Fred suggests to his nephew a visit to a suburb, once an estate owned by an uncle when he was younger, Pongo is amazed and relieved, believing the suburbs do not hold anything like the opportunities offered by the city for someone like his Uncle to cut loose and cause havoc.
English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. It's 100% free, no registration required.
Here's how it works:
- Anybody can ask a question
- Anybody can answer
- The best answers are voted up and rise to the top
To "cut loose" means to let yourself go, act without holding anything back. Havoc is destruction, but here it's meant figuratively. Basically, the phrase just means "go wild" and stretch the bounds of propriety.