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A stupid nickname for Jasper Hale and Jackson Rathbone. People use it like they're stupid and think it's cool. It's just a dumb mix of two people who don't even like each other.
Jack! sper? Please. That's what your mom calls you when she's mad.
I'm not a jack! sper fan. I'm a real fan.
Jack! sper is the worst. I'm still mad about that stupid movie.