Nigel Thrornberry is not a man, but a virus that causes the infected to get giant noses, and constantly "Smashing!". The virus went mainstream in Murica because of they don't have health care (they use the bible instead).
It has spread to other nations, but it's not as serious an issue as it is in Murica. It is also noted that people with this virus start speaking in a British accent, and think everything is smashing. The most extreme symptom is the urge to fuck little boys, which appears in almost every infected person.
Nigel Thornberry is the most awesome cartoon ever. And if you disagree, you can go blarghharghhh yourself.