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Taken as an advance to "backpack" in reference to referring to a girl/chick as a hottie. In relation to Backpack in Dora the Explorer (Yum Yum Yummy). Mrs Backpack referrs therefore to a Yummy Mummy / Milf
That girls alright, but her mums sure a bit of Mrs Backpack!
by AJ1982 April 18, 2008
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