Someone who constantly attracts attention from sketchy people.

A sketch magnet may or may not enjoy the shady people who always want to associate with them.
Girl 1: "Yeah, remember that sleazy guy I hooked up with back in the day? He wants to hang out again next time he's in town."

Girl 2: "Gross. You're such a sketch magnet."
by SunnyMuffinss March 22, 2011
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