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What Does âP.U.â (As in Something Smelly) Stand For? Mark C. asks: What does the letters in the stinky term P.U. stand for? Often used to accuse someone of exceeding his allotted level of funk, P.U. is, surprisingly, not an acronym, but, rather, likely was derived simply from the pronunciation of its parent word. Dating back to the early 17th century, a common exclamation of contempt for a foul odor was pyoo.
Natural gas is odorless, but it is a common practice to add a distinctive chemical odorant called mercaptan. SÂ·CÂ·UÂ·D has done this so that you can more easily recognize the presence of natural gas, should you have a leak. The chemical odor is frequently compared to the smell of rotten eggs. If you smell something like this, please call us immediately. In the event of an emergency, call the SÂ·CÂ·UÂ·D 24-hour emergency line at 865-453-3272.