Definitions for jello
fruit-flavored dessert (trade mark Jell-O) made from a commercially prepared gelatin powder
A dessert made by boiling gelatin in water
A dessert made by boiling gelatin in water.
Origin: Genericization of the brand name Jell-O.
The New Hacker's Dictionary
[Usenet: by analogy with spam] A message that is both excessively cross-posted and too frequently posted, as opposed to spam (which is merely too frequently posted) or velveeta (which is merely excessively cross-posted). This term is widely recognized but not commonly used; most people refer to both kinds of abuse or their combination as spam.