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
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...
Joey from Orono, Minnesota, has been learning Italian and its many idioms, which makes him wonder if there are other languages that can simply be learned in a classroom without input from a larger cultural context of new and evolving expressions...