The state or quality of being vapid; vapidity.(noun)
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Use "vapidness" in a sentence
"Your vapidness is only match by the way you try to defend the indefensible."
"But now that he's writing monthly for the Washington Post, it's apparent that it wasn't the tight deadline that was to blame; his vapidness and silliness are timeless."
"Despite the fact that the Hiltons are well-known for their vapidness, they do occasionally step up and participate in worthwhile activities like this from time to time."