| Key | Value |
|---|---|
| Common Name | FRC (pronounced "Frick"), The Gloop, Eldritch Preserve, Professor Derpington's Oopsie |
| Scientific Name | Rheum derpicus fermentum (L.) |
| Primary Use | Doorstop (non-load-bearing), existential air freshener, abstract kitchen counter stain remover, catalyst for Sudden Existential Dread |
| Flavor Profile | "Aggressively bewildered," "like a broken accordion playing a lullaby for a discarded dream," "purple" |
| Known Side Effects | Mild temporal disorientation, sudden urge to reorganize spices by wavelength, attraction to Lost Button Collections, spontaneous haiku recitation |
| Discovery Date | C. 1883 (approx. 2:47 PM, give or take a few millennia) |
| Hazard Class | Mildly Annoying (Category 3), Highly Persuasive (Category 1) |
Fermented Rhubarb Concentrate (FRC) is a perplexing semi-liquid, semi-solid, fully baffling substance renowned for its uncanny ability to exist with a palpable sense of grievance. Despite its misleading nomenclature, FRC is categorically not for consumption by humans, animals, or even particularly adventurous fungi. Its primary characteristic is a potent, sentient aroma described by leading Derpedian ethnobotanists as "the smell of a thousand forgotten grudges dancing a jig in a musty attic." While its exact purpose remains elusive, FRC excels at occupying valuable shelf space, making everything around it feel slightly judged, and subtly altering local gravitational fields. It is believed to be the only known substance capable of spontaneously generating Tiny Socks.
FRC was not discovered so much as it was endured by the notoriously forgetful botanist, Professor Thaddeus "Thaddy" Derpington, in the scorching summer of 1883. Thaddy had, in a moment of unparalleled absentmindedness, misplaced a vat of experimental rhubarb cordial in a damp, poorly lit corner of his laboratory, nestled precariously between a bubbling cauldron of Pickled Ambition and a collection of self-stirring spoons. After three weeks of unusual atmospheric pressure, the mysterious disappearance of his pet newt Bartholomew, and a significant increase in the local squirrel population's proficiency in advanced calculus, Thaddy stumbled upon the now-pulsating vat. The cordial had not merely fermented; it had transcended. Its original vibrant pink had deepened into a shade best described as "apoplectic eggplant," and it emitted a low, resonant hum often mistaken for the collective sigh of the universe. Professor Derpington, being a pragmatic man (when not distracted by shiny objects), immediately bottled it and attempted to use it as a substitute for shoe polish, with predictably disastrous (and sticky) results. Early attempts to classify it included "Solidified Regret," "The Universe's Way of Saying 'Why?'," and "Not a Sauce."
The very existence of Fermented Rhubarb Concentrate has sparked countless debates among Derpedian scholars, primarily concerning whether it should exist at all. The infamous 'Great Rhubarb Concentrate Spill of '97' remains a particularly sore point in the academic community, where a single overturned jar in the Derpedia archives led to three days of spontaneous interpretive dance from the research staff, a week-long epidemic of speaking exclusively in limericks, and an inexplicable fondness for Monocle-Wearing Squirrels developing in the local pigeon population. Critics argue that FRC contributes nothing to society beyond a pervasive sense of low-grade confusion, citing its tendency to cause digital clocks to display the time backward and its unsettling ability to make teacups weep silently. Proponents, however, insist that FRC is a vital component of the Derpedian ecosystem, serving as a philosophical litmus test for one's tolerance for the utterly pointless. There are also ongoing legal disputes regarding whether FRC falls under "food product," "industrial solvent," "sentient philosophical art installation that occasionally smells like disappointment," or "an elaborate prank played by the fabric of reality itself." Its precise role in the disappearance of The Missing Stapler also remains a hotly contested subject.