nothing between the/(one's) ears

No intelligence or common sense whatsoever (i.e., nothing in the head where the brain should be). She seems nice enough, but I get the sense that there's nothing between the ears. Jake always goes out with really attractive guys with nothing between their ears.

See also: between, ear, nothing

See also:

be not much between the ears
have nothing between the/(one's) ears
not have much between the ears
ain't got a grain of sense
ain't got the sense God gave geese
ain't got a lick of sense
horse sense
lack common sense
common
not know enough to come in out of the rain

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