Getty / Marion County Jail Composite

Eminem has a new girlfriend, as we reported last week ... and now he supposedly has a new wife too -- at least according to a woman who allegedly refused to pay for her meal at a Florida diner.

The incident went down Monday when 54-year-old Jennifer Kleber reportedly sat down to grab some grub at Darrell’s Dog Gone Good Diner in Silver Springs. After she polished off the last bite, the bill came, but she turned her nose up at it.

According to the police report, obtained by TMZ, the manager got involved, and remembered Kleber from her previous visits to the restaurant ... because she allegedly didn't pay those bills either.

But this time, there was a twist ... when the police arrived, Kleber told a corporal her “spouse” is none other than Marsha

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