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1 definition by emerald lizard

Acronym for "submissive seme, dominant uke".

In yaoi, a sexual situation with dominance/submission in which the seme (person penetrating) obeys and the uke (being penetrated) decides what happens.
In chapter 3, we finally get to the sex: delicious SSDU.
by emerald lizard May 15, 2008
5 1