Top Definition
The blatant act of liasing with married woman with a view to returning the target of the dirty sephton's attentions back home. From observations of the work in practice of a number of dirty sephtons they have lost all belief in the institution of marriage and thus seek comfort in reaking their own vengeance.
See that bloke in the corner talking to my missus, I dont trust him, he looks like a Dirty Sephton to me.
by Jackie de Mos May 25, 2007
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