to be extremely drunk or high, but at the same time, enjoyable.
Also used as a verb to "shmack", or as an adverb as in "shmacking."
"this video shows others in their words, getting "shmacked""
"i'm obviously shmacked as hell right now"
"walt thank you very much, more on shmacking, later"
"to commerate being shmacked the creators of the video are now selling T-shirts."
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