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word used to described a person who has been drunk and/or high on their birthday. or those who think its their birthday.
blonde girls getting shmamcaked when drinking Irish car bombs at TGIF on a Tuesday.

Afro American peoples gettin shmamcaked drankin, grape juice Malt liquor & cough syrup
by ΒΏPokesmotΒΏ February 04, 2010
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