drive carefully, the road is as slippery as a butcher's prick  watch that guy, he's as slippery as a butchers prick
an expression from new zealand: extremely slippery, treacherously slippery difficult to pick up or hold because it is slippery
"drive carefully, the road is as slippery as a butcher's prick  watch that guy, he's as slippery as a butchers prick" What is the definition of "as slippery as a butcher's prick"?