What is Seanniversary?
1.
A Celebratory Orgy celebrating the anniversary of a new friend being introduced into an established clique.
A group of buds have been an established clique for two or more years, and they allow a new guy in, and after a year of his inclusion, you celebrate his "Seanniversary"
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1.
A lower version of the restaurant Outback} Steakhouse. Used to be cheaper than Outback, and thus worth the lower-quality food, but since..