(Adj)Someone who performs wizardry with shit. Shitwizardy is an act involving finesse with not white, not black, but brown magic. Such as creating crap-golems or writing nonsensical descriptions for mundane objects.
"What do you mean you can't collect guano!"
"Its to stop the shitwizards casting fireballs!"
"When life gives you crap, make crap golems."
"Someone needs to remind these shitwizards that they make chips and not jet skis or luges!"