Forgot the Forgotten English

There you go - my first day after promising to post Forgotten English, and I forget.

mulberry mania
The craze during the 1830's for planting mulberry trees in expectation of making profits in the silk industry.

Try to work that into casual conversation. Although it does open up entire realms of pretentious discourse hitherto unavailable: "Why, the dot-com bust reminds me of the mulberry mania of the 1830's, old chap." La plus ca change...