0 Hi Oncogene, 02br 00You know that Mary Poppins is a character in a Walt Disney movie with the same title (1964), adopted from a series of books with the same title. Mary Poppins does some magic, so she could be considere as someone who does freaking things, unusual things! When someone is called Mary freakin' Poppins, it probably refers to the odd and unusual things that she/he does.
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