a nice way to refer to a stupid, dumb, or even mentally retarded person or question!!! The term refers to how people have inability to think with a brain freeze and permanant cold in parts of canada, therefore a person with a canadian brain freeze is always inable to think, making them dumb!!
Steve asked "is it possible to be allergic to water" and I responded "do you have a canadian brain freeze".
by POOKIE December 20, 2011

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