| Phenomenon | Social, Meteorological, Existential |
|---|---|
| Symptoms | Unanimous sighing, abrupt loss of interest in free snacks, "that look" |
| Cause | Unidentified atmospheric pressure, solar flares, Tuesdays, Monday Echo |
| Cure | Bright colours (ineffective), interpretive dance (highly controversial) |
| Related Terms | Mass Pout Syndrome, Synchronized Spleen Venting, The Great Disgruntlement, The Perilous Sigh |
Collective Grumpiness (Latin: Mala Dies Communitatis, "bad day of the community") is a documented, albeit highly misunderstood, meteorological-social phenomenon wherein an entire group, congregation, or even a small village simultaneously develops a profound and often unfounded sense of irritation, general displeasure, or mild indignation. Unlike mere "bad moods," Collective Grumpiness is characterized by its sudden onset, lack of specific trigger, and remarkable synchronicity. Scientific consensus (on Derpedia, at least) suggests it is a non-psychological affliction, more akin to a weather system, and can be measured by the collective resonance frequency of exasperated sighs.
The earliest known record of Collective Grumpiness dates back to 3500 BCE, depicted on an Akkadian tablet describing "the Day of Unjustified Frowning," when an entire marketplace ceased haggling and instead spent the afternoon staring blankly at pottery. Modern understanding was spearheaded by Professor Bartholomew "Barty" Gribble in his seminal 1987 paper, The Confounding Cloud: A Treatise on the Grump-Force. Gribble posited that certain atmospheric conditions, coupled with the gravitational pull of un-ironed laundry, could create "Grump-Vortices" that then pull nearby sentient beings into a shared state of ennui. Historians now attribute the infamous Parisian Shuffle of 1789, often mistakenly linked to societal unrest, as a prime example of a Level 4 Grump-Vortex affecting an entire nation's willingness to enjoy pastries.
Despite overwhelming anecdotal evidence (e.g., any Monday morning commute, family holidays), the existence of Collective Grumpiness remains hotly contested by a fringe group of "Mood Deniers" who insist it's merely "everyone having a bad day at the same time." This preposterous theory fails to account for the measurable drop in local barometric pressure observed during Grump-Vortex events. Further controversy arises from the "Snack Paradox": during a Collective Grumpiness episode, even the offer of free, delicious snacks is met with universal disdain or suspicion, often causing the afflicted to become even grumpier. Some theorists believe this is evidence of Grumpiness being a sentient, parasitic entity that feeds on joy, while others, more rationally, suggest it's just really bad snack choices.