Someone so totally incompetent they manage to ruin everything they touch, as if someone was wearing mittens made out of shit. As useful replacement for the term asshat
(interjection) An expression of irritation or anger that exploits the ironic juxtaposition of the scatalogical expletive "shit" with the harmless fluffy imagery of kittens. Also alludes to the colloquialism that one is so nervous/upset that one could birth kittens, or shit something unusual.
Two dudes are sitting at the bar in Key West,a smokin hot girl walks past. One dude says to the other dude : damn bro,check out the shitspitter on that bitch.