harangue

from Dictionary.com

harangue \huh-RANG\, noun:
1. A speech addressed to a large public assembly.
2. A noisy or pompous speech; a rant.

transitive verb:
To deliver a harangue to; to address by a harangue.

intransitive verb:
To make a harangue; to declaim.

Harangue derives from Medieval French arenge, from Old Italian aringa, from aringare, "to speak in public," from aringo, "a public place for horse racing and popular assemblies," ultimately of Germanic origin

See post above this one for my harangue of the day.