this is when you are having sex doggy style and right before you ejaculate you knock the womans arms out from under her causing her to fall like a brokentable, which usually causes her to tighten up her muscles making your nut that much more enjoyable.
What happens when you fall down (usually drunk), break your fingers and land in a pile of dogshit.
I fell off the swing broke my fingers and landed in a pile of dogshit, now I've got dogshit broken fingers! Can you come take me to the hospital my fingers really hurt and they stink too