socks and knocks
n.pl.— «The seven criteria pollutants are carbon monoxide (CO); lead; sulphur dioxide (SOx) and nitrogen oxide (NOx) (often called “socks and knocks”).» —“Air Quality Regulation in Minnesota” by Mike Bull in Research Department of the Minnesota House of Representatives House Research Short Subjects (St. Paul, Minn.) Oct., 2002. (source: Double-Tongued Dictionary)
Further reading
Carrie Ann and her cousin Danielle from Minneapolis, Minnesota, wonder about the pronunciation of the word rhetoric. Is the stress on the first syllable or the second? This is part of a complete episode.
Related
After our conversation about towns with extremely short names, many listeners wrote to tell us about Why, Arizona. Others pointed out that there are towns called Ely in Iowa, Minnesota, and Nevada. Other super-short appellations include Rye, New...