flubber · noun1
Blend of flying + rubber; originally the name of a fictional substance in the film The Absent-Minded Professor (1961).
flubber · noun2
Etymology from Wiktionary, CC BY-SA 4.0.
flubber
Today it means: A rubbery polymer formed by cross-linking of polyvinyl alcohol with a boron compound, used as a plaything or to demonstrate physical properties. Full definition →