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1.
A misplaced pop culture reference, usually caused by confusing similar names or words, and referring to someone/something irrelevant or ridiculous in context.

As with a malapropism, the confusion and result are similar; however, rather than confusing the meaning of standard English words, one is confusing similar-sounding names & pop culture references.

A malapopism can also occur when someone is unaware of the fact that the same name refers to a different person/thing/event, and makes an inappropriate reference based on that mistaken assumption.
Both kinds of malapopisms (similar names; same name but different people) in conversation:

Jen: The Cottingley fairies were a hoax, and Arthur Conan Doyle was fooled. James Randi's book tells all about it.
Arshad: Damn fairies, always wanting to restrict the free market! :)
Everyone: *stares blankly*
Arshad: You know... all that Libertarian stuff Randi wrote?
Everyone: Oh, you mean Ayn Rand!
Arshad: ohhh.

Who were the Senators from Illinois before Obama and Durbin?
Well, before Durbin was Paul Simon...
Hah, did he sing "Sound of Silence" to the Senate?
Dude, that's not the same Paul Simon!
by my name is Cos October 26, 2008
13 1
 
2.
A misplaced pop culture reference, usually caused by confusing similar names or words, and referring to someone/something irrelevant or ridiculous in context.

As with a malapropism, the confusion and result are similar; however, rather than confusing the meaning of standard English words, one is confusing similar-sounding names & pop culture references.

A malapopism can also occur when someone is unaware of the fact that the same name refers to a different person/thing/event, and makes an inappropriate reference based on that mistaken assumption.
Both kinds of malapopisms (similar names; same name but different people) in conversation:

Jen: The Cottingley fairies were a hoax, and Arthur Conan Doyle was fooled. James Randi's book tells all about it.
Arshad: Damn fairies, always wanting to restrict the free market! :)
Everyone: *stares blankly*
Arshad: You know... all that Libertarian stuff Randi wrote?
Everyone: Oh, you mean Ayn Rand!
Arshad: ohhh.

Who were the Senators from Illinois before Obama and Durbin?
Well, before Durbin was Paul Simon...
Hah, did he sing "Sound of Silence" to the Senate?
Dude, that's not the same Paul Simon!
by my name is Cos October 26, 2008
1 1