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
Following our conversation about the secret cup code of the old Harvey House restaurant chain, a listener in Minneapolis, Minnesota, shares a far more complicated and efficient restaurant code, the elaborate plate marking system used at Waffle House...
Book recommendations and the art of apology. Martha and Grant share some good reads, including an opinionated romp through English grammar, a Spanish-language adventure novel, an account of 19th-century dictionary wars, and a gorgeously illustrated...