death cookie
n.— «Meanwhile, cyclist Dave Davies said the junction of Nootka and Village Way is designed in such a way that gravel is spewed into the intersection. These “death cookies,” as he called them in his letter to council, build up and make cycling dangerous.» —“Traffic concerns pepper town” The News (Vancouver Island, British Columbia, Canada) Oct. 10, 2006. (source: Double-Tongued Dictionary)
Further reading
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