Top Definition
1. A secret spell hidden in the depths of the restricted section in the Hogwarts School of Witchcraft and Wizardry library. It will inflict the victim with the uncontrollable urge to do the chicken dance and simultaneously shout their most embarrassing moments in Shakespearean language.

2. Used as a slang word in place of embarrass or humiliate.
1. James: "ultramassavarium!"

*points wand at severus*
Severus: *doing chicken dance* "HAVE THOU, A YOUNG ROSE WHO SHALL BE NAMED LILLIUS EVANS DOTH NOT LOVE ME!"

2. "Oh boy, am I gonna ultramassavarium you one day!"
by wordtaxi September 26, 2010

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