Top Definition
When a girl is so large she wears a tight top that pulls the rolls of fat up on her back as if she has a pair of tits on her back!
i was gettin my appendix out,the nurse had a diddy back and i laughed so hard i near burst my stitches!
"she got a diddy back - yeah,take her to the fridge"
by shanemuldoon December 17, 2009
5 Words related to Diddy Back

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