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To wish a person to the mattress; to fantasize about taking someone to bed by way of sexting or conversing in person.
Girl 1- " I was totally sexting this hot guy, telling about all the awesome things I wanna do to him in bed"

Girl2- "He's trying to be a gentleman and all you're doing is mattressizing him, have some class".
by T$KY January 14, 2015
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