Terence James O'Neill, Baron O'Neill of Gatley (born 17 March 1957)[1] is a British economist best known for coining BRIC, the acronym that stands for Brazil, Russia, India, and China—the four once-rapidly developing countries that he predicted would challenge the global economic power of the developed G7 economies.

[5][6] He earned his PhD degree in economics from the University of Surrey in 1982, with a thesis titled An empirical investigation into the OPEC surplus and its disposal.

[11] Other terms he coined or adopted and popularized have been the "Next Eleven" (or N-11) for Bangladesh, Egypt, Indonesia, Iran, Mexico, Nigeria, Pakistan, the Philippines, South Korea, Turkey, and Vietnam, arguing they would be among the world's largest economies in the 21st century.

In November 2013, he adopted and popularized MINT for Mexico, Indonesia, Nigeria and Turkey, which had been coined by Fidelity International in May 2011.

[20] On 2 July 2014, he was appointed by UK Prime Minister David Cameron to head an international commission to investigate global antimicrobial resistance.

[21] In 2018, Lord O'Neill published the book Superbugs: An Arms Race Against Bacteria co-written with Anthony McDonnell and Will Hall.

[28] On 2 March 2010, the Red Knights, a group of wealthy Manchester United fans believed to include O'Neill, confirmed interest in a possible takeover of the club.