Someone who is incontinent and shits themselves silly. Kackensplatters often wear adult nappies that are useless, sometimes the explosive mass of turd expands up the nappy onto the back region.
“Keith, Mum has Kackensplatterd again, get your gloves on you have some clearing up to do….!”
Keith sat back to watch T.V. Suddenly a gurgling noise could be heard followed by that distinctive deep “whoosh” sound. Keith new straight away that Mum had Kackensplatterd. Confirmation was met with the overwhelming smell of fresh steaming shit caked on an old woman’s back.