When your sitting on the toilet dropping the kids off at the
pool and the crap keeps coming out in a single
piece until it finally breaks off and slaps against your ball
sack.
I was sitting on the toilet and the
turd was so long that it hit the bottom of the bowl and continued to
work its way up the side. When it finally dropped from my ass it slapped my ball
sack thus being termed a Sack-Slapper.