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the debris and subsequent staining experienced after jizz escapes out your vag onto various items of furniture/clothing/pets before you manage to make it to the bathroom. Usually observed in several small fanny splats on the carpet if running. Can also be deliberate and vindictively placed.
please don't fanny splat my pillow.

i can't believe she fanny splatted my pillow.
by fannysplatter February 09, 2010
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