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1.
n. Someone--usually female--who continually attracts unwanted/creepy sexual attention and no normal attention. Fusion of pervert and magnet (though reversed).

The person does not necessarily have to be attractive.
"That creepy guy kept commenting on her 'sweet, sweet, sexy' legs that were propped up on the desk. Mary is so unlucky; she's such a magnert."
by orixa April 27, 2010