Top Definition
NOUN. Having the tendency to generally have the urge to rock!


Doctor: "I am sorry to say, John Lennon, has 'Mcrocksosmosis,'"
Wife: "What does that mean for him?!?"
Doctor: "He will never be able to stop wanting to rock...ever. There is no cure yet."
Wife: :'(
by Martin Green May 08, 2008
6 Words related to Mcrocksosmosis

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