A 'malamanteau ' (pronounced ˈɛɪjaˌfjatl̥aˌjœkʏtl̥) (plural malamanteaux) is a neologism for a portmanteau created by incorrectly combining a malapropism with a neologism. It is itself a neologism, a malapropism and a portmanteau (of malapropism and portmanteau). In a less strict definition, a portmanteau of a malapropism with another word can also be considered a malamanteau. The contained malapropism must be typically a very common one, probably one most people are not aware of, in order to be able to regain the meaning of a malamanteau.
A malamanteau often is created when somebody tries to use a neologism (alternatively, an idiom) but mistakenly confuses a word with another one. However, unlike a malapropism or an eggcorn, the fumbled word is not completely replaced, but merely transfixed to the new one. A famous example is: "misunderestimate" which was popularized by the 43rd President of the United States, George W. Bush. Probably it was intended to be "underestimate" but mistakenly jumbled with "misunderstand."
- Somebody describes his misunderstanding of what someone was saying by stating, "I misconscrewed it up."
- Someone explains his inability to talk while being upset by saying he was "flustrated."
- A meaningful malamanteau is "ambiviolent," as in: "Beatrix Kiddo in Kill Bill was ambiviolent. She didn't know who to kill first."
- George W. Bush's inadvertent malamanteau "misunderestimated" has entered common usage.
- Someone describes being misinformed as "being miscommunicado", a mixture of miscommunicate and incommunicado.
- In Neil Gaiman's Anansi Boys, the word "absatively" is described as "a car crash between absolutely and positively".
- Sarah Palin's inadvertant Twitter containing "refudiate", being a combination of "refute" and "repudiate".