Top Definition
1. To be completely and wholly crazy, nuts, cookoo, crazola and/or insane. (N.)

2. Describing a mind boggling sensation, feeling or action in which the laws of the known universe cannot explain. A insanitarious night maybe one of indescribable proportions and may be just treated as a wild dream.
Guy 1 "Jane is acting soo weird today, who did she spend her day with yesterday?"

Guy 2 "Ohh she spent it with Kevin."

Guy 1 "No wonder shes gone insanitarious right now !"
by Bob Loblaw Jr. July 28, 2010
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