The sound of something splattering messily.(interjection)
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Use "kersplat" in a sentence
"I think a baby would fall off my back kersplat into the sand."
"I was just walking around checking out the flower beds and the garden, stepped in a hole and kersplat!"
"SO I sat down to write last night, the first time I've attempted such a feat since the external harddrive went kersplat over the weekend, taking my entire body of work with it."