/oo'blik/ n. [from the Dr. Seuss title "Bartholomew and the Oobleck"; the spelling `oobleck' is still current in the mainstream] A bizarre semi-liquid sludge made from cornstarch and water. Enjoyed among hackers who make batches during playtime at parties for its amusing and extremely non-Newtonian behavior; it pours and splatters, but resists rapid motion like a solid and will even crack when hit by a hammer. Often found near lasers.
Here is a field-tested ooblick recipe contributed by GLS: 1 cup cornstarch 1 cup baking soda 3/4 cup water N drops of food coloring This recipe isn't quite as non-Newtonian as a pure cornstarch ooblick, but has an appropriately slimy feel.
Some, however, insist that the notion of an ooblick _recipe_ is far too mechanical, and that it is best to add the water in small increments so that the various mixed states the cornstarch goes through as it _becomes_ ooblick can be grokked in fullness by many hands. For optional ingredients of this experience, see the "Ceremonial Chemicals" section of Appendix B.