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A girl who is so obsessed with the idea of being Sweeney Todd's girlfriend that she will shut herself away from all other attempts at wooing. This girl is usually Goth, emo, or at least is attracted to men with wild black hair and eyeliner. She is sometimes so obsessed with the idea of dating an innocent-looking, quite cute and sexy serial killer, that she is more than willing to pull a Nellie Lovett and die rather than not date a serial killer.
Dude 1: Hey, did you get a date with Artemis yet?
Dude 2: Nah, she's a total SweeneyChick. If I hear her sing "A Little Priest" one more time, *I* might have to throw her in the oven.

Dude 1: I never understand those girls. Don't they realize he'd just end up killing them?
Dude 2: I think that's what turns them on...
by Artemis Vandelay July 23, 2011
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