Acronym for "Shit You Don't Need"*
Used to pejoratively refer to anything that that can be regarded as useless, overpriced, a fad and generally all that is related to consumerism.
*Yet to be accepted by the internet community.
Jimmy: Have you seen the new iPhone?
Michael: Yup, such a sydn!
Michael: You noob!
Prices shown in USD.
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