the result of working long hours in a hot kitchen, when the sweat from your back slowly dribbles down and inbetween your buttcheeks and starts to mix with the residue of uncleaned feaces still left there, then gets constantly mixed by the "chef" moving around and if left for days will develop and mature into an unidentifiable black substance. congratulations, you have achieved chef's crack. smells extremely bad. and a very fermented sample may have traces of crude oil and motor lubricants smells, together with an overpowering smell of shit and old jogging socks.
antonio at Fat Angelo's had a very bad case of chef's crack, no one wanted to be near him.