Born in Wellington in 1944, Peter struggled at school with what would now be recognised as dyslexia. He left Wellington Tech at age 15 and worked as a telegram delivery boy before securing his first butchery job in Seatown, where he learned the trade. After moving to Auckland, Peter opened his own butchery on Rosella Road, where a sign outside his store reading "Rosella Meats, home of the Mad Butcher" gave him his famous nickname. He grew his business significantly, particularly through radio advertising, and found time to pursue other passions, including an unwavering support of rugby league and championing various charitable causes.

Peter’s philanthropic work earned him a Queen’s Service Medal in 1991, and later, he was made a Knights Companion of the New Zealand Order of Merit. He has been married to Janice for many years, and together they have two grown daughters and four grandchildren.