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Scynix Tsundere has pretty much lost all meaning these last few years. I'm seeing some people misusing Yandere lately too. Really now, people should cease using slangs or words they don't understand. Nowadays even google is unreliable because the same guys who are misusing those words, are writing topics on wikipedias and other free dictionaries using their wrong interpretations to spread the misinformation.
As for the term, I don't thing we have a proper english term for that. Might as well create one right now.
Let's see... Pedotrap?
Edit: Which reminds me. People has been using the word Trap wrongfully too. A couple of SJW mods have been banning people who merely mentions "Trap" on a "certain game's" Server chat. Saying that people who use this term are homophobic. Homophobic... Since when did Trap ever meant transvestites or transgender people?
Proper traps don't even dress themselves as girls(on a normal basis, they sometimes get dressed as girls against their will, as a joke) they are just androgynous males or females