Sturm und Drang

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Turmoil; ferment: "A book's historical roots represent another barrier; so does the personal Sturm und Drang of the author” ( Robert Kanigel).
2. n. A late-18th-century German romantic literary movement whose works typically depicted the struggles of a highly emotional individual against conventional society.

Wiktionary

1. n. Turmoil; a period of emotional intensity and anxiety.

WordNet 3.0

1. n. a state of violent disturbance and disorder (as in politics or social conditions generally)