A brand of humour, increasingly regarded as the pinacle of comedy in the western world. Named after Will Ferrell, leader of the comedic troup: the Frat Pack, the theory of WillFerrellism may be applied to any form of media, rendering it "outrageously funny". On the surface, WillFerrellism appears as basic slap-stick humour, however, further examination reveals a wealth of complex ideas firmly rooted in philosophy and the sciences. Core examples of WillFerrellism include "The Anchorman: The Legend of Ron Burgundy", and "Old School".

WillFerrellism is sometimes used to describe the practice of dragon imitation, and often has sexual overtones.