When a woman's vagina has part of the lips hanging out.
Sort of like a cavern, with rocks coming out of the top.
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| <-- Like this.
Bob: "Oi, charlese?"
Charlese: "Yes?"
Bob: "How old are you?"
Charlese: "Thirty Seven, Why?"
Bob: "Because you've got a sloppy mop hangin' out back here".
A particularly sloppy blowjob with Louisiana brand hot sauce smothered on the penis
Guy 1: “yo bro, last night Hayleigh went down and dirty and gave me some of that southern sloppytoppy”
Guy 2: “damm bro, that must have burnt like crazy”