Malamanteau: Absatively

- Definition: A car crash between absolutely and positively
- Portmanteau: absolutely + positively
- Malapropism*: absolutely, positively

Source: XKCD Wiki / Neil Gaiman's Anansi Boys

* Note: Unless this portmanteau is used incorrectly towards it's listed malapropisms, it would not qualify as a malamanteau.

Malamanteau: Irregardless

- Definition: To be irrespective, regardless?
- Portmanteau: irrespective + regardless
- Malapropism: irrespective and regardless

Source: Language Log - Lingustics in Comics

Malamanteau: Insinuendos

- Definition: To insinuate an innuendo?
- Portmanteau: innuendo + insinuation
- Malapropism: innuendo and insinuation

Source: The Boston Globe - One-day wonder

Malamanteau: Bewilderness

- Definition: To be bewildered and in the wilderness?
- Portmanteau: bewildered + wilderness
- Malapropism: bewildered and wilderness

Source: The Boston Globe - One-day wonder

Malamanteau: Overflowded

- Definition: To be crowded and overflowed?
- Portmanteau: overflowed + crowded
- Malapropism: overflowed and crowded

Source: Metafilter - How to define this language mistake

Malamanteau: Exorberant

- Definition: To spend too much money and be happy about it
- Portmanteau: exorbitant + exuberant
- Malapropism: exorbitant and exuberant

Source: Metafilter - How to define this language mistake

Malamanteau: Spontanimosity

- Definition: To hate someone when you instantly meet them
- Portmanteau: spontaneous + animosity
- Malapropism: spontaneous and animosity

Source: Metafilter - How to define this language mistake

Malamanteau: Portmanpropism

- Definition: Combination of a portmanteau and a malapropism
- Portmanteau: portmanteau + malapropism
- Malapropism: portmantea and malapropism

Source: Metafilter - How to define this language mistake

Note: Again if these portmanteau neologisms are just used correctly, they are not being used as malapropisms and therefore wouldn't be malamanteaus.

Malamanteau: Ambiviolent

- Definition: To be both violent and unsure
- Portmanteau: ambivalent + violent
- Malapropism: ambivalent and violent

Malamanteau - XKCD Wiki

(Note: ambiviolent would only qualify as a malamanteau if it was used as a malapropism in place of ambivalent or violent, not if it was used intentionally to mean "I can't decide who to kill first")

Malamanteau: Misunderestimate

- Definition: To both misunderstand and underestimate something
- Portmanteau: misunderstand + underestimate
- Malapropism: misunderstand and underestimate

Malamanteau - XKCD Wiki

Malamanteau: Mal-manteau

- Definition: The outfit that the character Mal wears on the show Firefly
- Portmanteau: Mal + manteau
- Malapropism: malamanteau

Source: XKCD Forums, user iamed2

Malamanteau: Snowclone

Snowclone
- Definition: Clone of someone made out of snow
- Portmanteau: snow + clone
- Malapropism: snowcone

Source: XKCD Forums, user blumdude

Malamanteau: Portmantraction

- Definition: Combination of two words (portmanteau)
- Portmanteau: portmanteau? + contraction
- Malapropism: portmanteau

Sources: Homestar Runner Wiki, XKCD Forums, user csours

Note: Technically a portmantraction might just be a grammatical error, not actually a portmanteau, since it uses portmanteau as the first part of it's portmanteau.
But it's still noteworthy in that it was used incorrectly in the place of portmanteau, and it clearly combines portmanteau and contraction.

Malamanteau: Blogosfear

- Definition: Fear of blogs
- Portmanteau: blog + fear
- Malapropism: Blogosphere

Source: XKCD Forums, user RabbitWho

Malamanteau: Miscommunicado

- Definition: To miscommunicate something while out of communication
- Portmanteau: miscommunicate + incommunicado
- Malapropism: miscommunicate and incommunicado

Malamanteau - XKCD Wiki

Malamanteau: Flustrate

- Definition: To be both flustered and frustrated
- Portmanteau: fluster + frustrate
- Malapropism: fluster and frustrate

Source: Wordnick - Malamanteau

Malamanteau: Masillerterate

Definition: What the stock market crash did to the economy
Portmanteau: masil + ilterate
Malapropism: obliterate

Source: Personal Money Store: Malamanteau | Defining a new word

Malamanteau: Misconscrew

- Definition: Misconstrue and also screw up
- Portmanteau: misconstrue + screw
- Malapropism: misconstrue

Source: Wordnick - Malamanteau

Malamanteau: Mallomanteau

- Definition: A mixture of a mallomar and any other dessert
- Portmanteau: marshmallow + portmanteau
- Malapropism: malamanteau

Source: Wordnick - Malamanteau

Malamanteau

A malamanteau is a neologism for a portmanteau created by incorrectly combining a malapropism with a neologism. It itself is a portmanteau of malapropism and portmanteau.

The word was most famously defined in an XKCD comic and caused significant disruption in the wikipedia community.

It was most prominently featured as news on Slashdot

The wikipedia entry for malamanteau is currently under debate.

Notes:
- Not all malamanteaus are by nature neologisms. They simply need to be a combined word (portmanteau) that is used incorrectly in place of another correct word (malapropism).

- A malamanteau must have it's own separate meaning as a combined word (portmanteau)

- A malamanteau must sound similar enough to another word to be used incorrectly (malapropism)

Either way we'll post them if they sound good! :)

Neologism

A neologism is a newly coined word that may be in the process of entering common use.

Examples:

Malamanteau - Coined by XKCD comic creator Randall Munroe

Malapropism

A malapropism is the misuse of a word which sounds like another correct word.

Examples:

Commiserate versus. Commensurate

Persecuted vs. Prosecuted

Elevate vs. Alleviate

Portmanteau

A portmanteau is a blend of two words and their meanings into one new word.

Examples:
Smoke + Fog = Smog

Wiki + Encyclopedia = Wikipedia

Spiced + Ham = Spam