Any liquid or semi-liquid that cannot immediately be identified.
This ranges from pastes found in the bottom of mayonnaise jars that have been waiting in the fridge for years, to that goo that showed up under your car.
The act of dropping, applying, spreading, or any sort of distribution of splid(noun). Inanimate objects can produce splid.
Verb: Do NOT open the fridge, something splid all over the bottom and I haven't cleaned it up yet.
It is delicately folded to create a rough triangle spoon-like device, useful for consuming yoghurt if no traditional spoon is available.