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A portmanteau (combination of two or more words or morphemes, see also wordbining) consisting of all or portions of insane/insanity, Santa, and antics. Describes the crazy acts undertaken by people who are altogether nutty about Christmas and associated decorations, celebrations, music, etc. One who overindulges in these acts could also be called an insantic.
We don't need any insantics like last year- just say no to flaming egg nog!!!

Ridiculous, St. Nicholas, i blame you for my wife and kids being 12ft tree decorating insantics.
insantics by markbe November 28, 2009

insanitize

To essentially wipe the mind of all sane thought (and likely replacing with insane thought, though not necessarily so), presumably from an encounter with something so incredibly insane as to have the power to do so.

This process is similar to sanitizing, but instead of removing dirt and/or germs, it removes rationale; thus, insanitize is an effective portmanteau of the words insane and sanitize.
"Don't pay attention to what he says, or he'll insanitize you with his stupidity."

{origin of phrase}
"So I was having a discussion with My Mother. The rest of the details are unimportant, logic and reason are the exclusive domain of the man." "Whut, what prompted this? Did I miss some epic fucktardation or something?" "Yes, yes you did. Be glad you didn't see it originally. This mirror alone will surely insanitize you."
insanitize by Nigrescence August 7, 2008

Infinitiest 

A hypothetical numerical amount larger than infinity; often used in childlike banter
"I love you most", cried Shannon. "Well I love you infinity", replied David. "I love you infinitiest!", she exclaimed.
Infinitiest by brightstar1776 March 19, 2009

InsaniTea 

A group of hysterical people whose political views are so extreme as to defy logic and reason. They can believe anything, no matter how insane, and they chronically regurgitate ridiculous sound bites because they stopped using their own brains.
When you join the InsaniTea Party, you are helping turn our country into an Idiocracy.
InsaniTea by [TOM] ThunderDawg November 19, 2011

insanitease 

When sum won tempts you tube too call the cops on them
Her lascivious insanitease led me too fuck her then pay her salary
insanitease by Elfane silurian January 18, 2019

hand insanitizer 

The suggestion that you need to wash your hands, and wash them again, specifically with a product that no longer exists, until you become insane with anxiety.
She had scrubbed and scoured her fingers and palms until they were raw, her bottles had all been emptied, and she was on the edge of crazy, needing to find more hand insanitizer.