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