"Unholy mix" refers to a combination or mixture of elements that is considered morally wrong, impure or incompatible, often creating negative consequences or a chaotic situation. Full definition
For this week's Buffet, an unholy mix of candy, bacon and Doritos.... (thelunchtray.com)
But he is encouraged by a study commissioned by an automakers» consortium showing that the thermal conversion process could be a solution to one of America's most vexing solid waste problems: the unholy mix of plastics and other leftovers from automobile metals recycling (see «Junkyard Oil,» below). (discovermagazine.com)
Some unholy mix of cotton, spandex and viscose lining compose this dress. (effortlesslywithroxy.com)