Ian Differ is a character from Dr Greginald Von Wiltonhausen's extraordinary novel "Wrath of Kàà." Roughly translated from his tribe name "Kàà Hu Rààh", Ian differ serves as a noble warrior for the Ùnukbae tribe. Ian is a powerful, ape like man who is outcasted from the tribe due to his rage fueled outbursts. From his time wandering the land of Jāru, Ian learns to harness his abilities, and so, returns to the tribe regaining their trust. Ian soon becomes the tribe leader due to his bravery in the legendary battle of Shű Ki Rà, in which his rage gave him the power to defeat the entire Kimirá tribe. Unfortunately, Ian becomes obsessed with his own abilities and is banished from the tribe. Tourn by his incompetence, Ian becomes a cave dweller and seeks refuge in the Swamps of Goró. The rage within Ian's mind eventually takes over, and transforms him into murderous beast. Disguising himself as a tribesman, Ian goes on a gruesome kill spree. As the novel progresses, Ian become more wretched with power. His hair begins to fall out and his vision begins to blur, weakening his abilities. He is then later defeated by the God of Archery, Dâârkfrúit, in a vicious duel on top of Mount Féóķ. Ian's rage infused soul is lifted from his body and drifts into the stars, so beginning its search for a suitable host, to poison with power.

If someone is referred to as an Ian Differ, they have allowed a feeling of power to overtake them, changing their attitudes and mindset drastically.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.