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Noun.A day where a girl or women can magically not get impregnated when getting ejaculated in. Commonly used in Hentai Manga/Doujin and Eroge Visual Novels.
Senpai:"If your hips keep moving like that I-I'm gunna c-cum,Anko-chan!"
Anko:"I-its okay,senpai...Today is my Safe Day. You can cum inside me all you want."
by Strawberrypantsu October 30, 2016
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