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
There was a time when William Shakespeare was just another little seven-year-old in school. Classes in his day were demanding — and all in Latin. A new book argues that this rigorous curriculum actually nurtured the creativity that later flourished...
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...