The act of an individual ejaculating on the face of another and promptly slapping them where they were initially came upon causing a "splashing" effect.
Billy gave Mandy a Splash Down.
by Guy Woodruff Jr. October 11, 2006
A babies due date or more specific the exact moment when the waters break and shit gets real
No way , didn't know she was pregnant so whens splashdown ?
How long now until splashdown ?
by Lolly14 January 30, 2015

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