|“||Brennan has a man-gi-NA! Brennan has a man-gi-NA!||„|
|~ Derek Huff|
He was portrayed by actor Adam Scott.
Derek is the vice-chairman of a helicopter-leasing company. Despite being his younger brother, Derek arrogantly mocks Brennan for being an immature, unemployed spoiled brat, along with Dale. They manage to get him back by posing at Ku Klux Klan members and Neo Nazis to scare away his customers and prevent him from selling their parents' house.
By the end of the film, Brennan is left on his own and works at his company. Derek realizes he was wrong and acknowledges his brother as the newfound adult he is and starts to treat him and Dale with respect.
He has a wife, Alice, who cheats on him with Dale, and two children; a son and a daughter.