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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.
Carbon Monoxide Safety. While natural gas has a scent added to it to help detect leaks BEFORE it gets used, any fossil fuel could produce an odorless, tasteless, colorless gas called Carbon Monoxide (CO) whenever it doesnât burn properly. CO can occur with a malfunctioning appliance or blocked chimney.