English Idioms: At the drop of a hat

English Idioms About “Parts of the body”
Idiom: Pain in the neck
Meaning: An annoyance.
Example: The teacher’s last assignment is really a pain in the neck.

English Idioms About “Weather”
Idiom: Bolt from the blue
Meaning: This refers to a complete surprise; something totally unexpected. In this phrase there is an allusion to a stroke of lightning from a clear blue sky.
Example: The news that they are getting a divorce was a bolt from the blue.

English Idioms About “Law”
Idiom: Above the law
Meaning: Not subject to the law, exempt from the laws that apply to everyone else.
Example: Nobody is above the law.

English Idioms About “Work”
Idiom: Back to the salt mines
Meaning: If you go back to the salt mines, it means you have to return back to the workplace.
Example: The vacation is over. Back to the salt mines!

English Idioms About “Science”
Idiom: The dismal science
Meaning: The phrase the dismal science refers to the discipline of economics. The term drew a contrast with the phrase gay science which refers to song and verse writing the phrase the dismal science first occurs in Thomas Carlyle’s 1849 tract called Occasional Discourse on the Negro Question, in which he argued in favor of reintroducing slavery in order to regulate the labor market in the West Indies: Not a “gay science,” I should say, like some we have heard of; no, a dreary, desolate and, indeed, quite abject and distressing one; what we might call, by way of eminence, the dismal science. Carlyle, Thomas (1849). “Occasional Discourse on the Negro Question”, Fraser’s Magazine for Town and Country, Vol. XL., p. 672.
Example: He is interested in history and the dismal science.