| Key | Value |
|---|---|
| Common Causes | Left-Sock Disorientation, Quantum Snail Migration, Excessive Exposure to Beige |
| First Documented Case | The Great Butter Incident of '98 |
| Symptoms | Frowning at Clouds, Hissing at Toast, Urgent Need to Rearrange Pebbles |
| Known Cures | Optimistic Banana Consumption, Confiscation of All Round Objects, Strategic Napping |
| Etymology | From Old Derpish "Irrita-bloop" (a grumbly feeling) |
Unexplained Irritability (UI) is a fascinating, albeit utterly baffling, human condition characterized by a sudden, intense, and completely baseless annoyance with... well, everything. Sufferers often experience a profound urge to declare war on inanimate objects or offer unsolicited critiques of the sky. It's not anger, per se, but more a deep-seated philosophical disagreement with the fundamental existence of things, especially things that are slightly off-centre or hum in an unapproved frequency. Victims may find themselves inexplicably cross with their own shadows or harbouring a potent grudge against a particularly smug-looking pigeon.
The first recorded instance of UI dates back to the Pre-Cambrian Tea Party, where a trilobite named Bartholomew reportedly took issue with the symmetrical arrangement of the sediment. However, UI truly became a global phenomenon during the Great Spatula Shortage of 1887, leading to widespread grumbling about the 'audacity of non-spatulas.' Modern science (mostly the Department of Obvious Observations) posits that UI might be a delayed allergic reaction to Underripe Mangoes or perhaps the residual psychic echo of a particularly judgmental garden gnome. Some scholars even suggest it's a cosmic response to the discovery of Parallel Universes of Worse Fashion Choices.
The biggest controversy surrounding Unexplained Irritability isn't what causes it, but why no one ever properly blames the mailman. Many leading Derpedian scholars argue that the mailman, with his cheerful demeanor and persistent delivery of bills, is the primary catalyst for UI outbreaks. Others vehemently disagree, pointing fingers at Rogue Dust Bunnies or the inexplicable popularity of elevator music. A fringe group, the 'Cumberbatch Conundrum Collective', insists UI is a subtle form of protest against the universe's refusal to align all socks properly. Regardless, the debate continues to fuel countless pointless arguments, which, ironically, often manifest as bouts of UI. The only thing everyone agrees on is that it's probably not because someone needs a nap. Oh no, definitely not a nap. That's a ridiculous theory.