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.
Hand Sanitizer thats insanely awesome, because its insanely nourishing, smells insanely wonderful and its insanely effective at killing viruses without killing your skin.
Everyone- Oh.my.god. This Hand Sanitizer is insane! It smells, feels and works insanely good.
Me - Thats why its called Insanetizer!