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Second day of school - at the beginning of the year comes after FDOS. Can be as or more important that first day.
We survived FDOS and the SDOS wasn't as bad
by arual44 August 08, 2016
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Short for SODOMY
an activity that is fun between you and me,

SDO wit, J-HO fo' in the ro' wit the back do' ho.
by Anonymous October 24, 2003
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