A sculpture of decommissioned guns bundled together with a wider exhibit which includes anti-gun multimedia projections, a list of victims of gun violence and a set of whiteboards for patrons to leave comments, it is also worshipped as the embodiment of violence and bloodshed. The name "murdercube" was placed on it by the 4chan weapons' board /k/ and generally written murder/k/ube.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.