What does flubber mean?
Flubber denotes a thick, sticky, often elastic substance with the consistency of slime, jelly, or goo. In ordinary modern use, it is chiefly informal and frequently playful: a mechanic might describe leaked lubricant as “flubber,” while a child might use it for an imaginative slime. The word also became the name of the sentient green material in the 1963 comedy The Absent-Minded Professor, a connection that gives it a fanciful, nostalgic edge. Because “flubber” is more evocative than precise, it is not a standard scientific term for a particular chemical or physical substance. Its usefulness lies in its comic suggestiveness: it evokes something both disgusting and entertaining, liquid enough to ooze but resilient enough to bounce. The related verb “flub” is quite different, meaning to make a mistake or perform badly; the two are easily confused in writing because of their shared opening.
nounA thick, sticky, gelatinous substance resembling slime or goo. The term is also associated with the sentient green material in a 1963 comedy film.
- A thick, sticky, gelatinous or rubbery substance, especially one resembling slime or goo.
"The mechanic wiped a glob of green flubber from the engine."
"A smear of turquoise flubber covered the laboratory floor."
"They built an improvised raft from green flubber."
Flubber is normally uncountable; the plural is rare and usually treats separate blobs or lumps as countable units.
"Several small flubbers bounced across the laboratory floor."
A sentient green blob from a 1963 family comedy made “flubber” a lasting name for whimsical, sticky goo.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does flubber come from?
“Flubber” was coined as the name of the extraordinary green substance in the 1963 comedy The Absent-Minded Professor. The name is commonly understood as a playful blend of “flub” and “rubber,” reflecting the substance’s gooey yet elastic qualities. It does not have a well-established family of English cognates beyond those components.
How flubber is actually used
Informal and often humorous or fanciful rather than a precise scientific term. It is especially associated with the sentient green substance in the 1963 film The Absent-Minded Professor.
Easily confused with flubber
A flub is a mistake or an unsuccessful performance, whereas flubber is a sticky or gelatinous substance.
Rubber is a solid elastic material, while flubber is generally a thick, gooey, ooze-like substance.