Master of Hentai. Tends to spend all free time watching anime porn. But you can't be just any watcher of hentai. To become master you must wank uncontrollably for an entire day. Then and only then will you be Hentai Senpai.
Boy 1: Hey look at that nerd over there! I bet you he has no friends!
Boy 2: Are you kidding? That's Hentai Senpai. He may not have friends but so many guys look up to him! I can't wait til I can one day become like him!
Boy 1: He's still a nerd.
by silverwin February 13, 2014
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A hentai senpai is a master of hentai who knows more then the average weeb about hentai
Hey you see that guy he is the hentai senpai all the guys look up to him
by Notorious senpai December 7, 2019
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