rant and rave - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Talk loudly and vehemently, especially in anger, as in There you go again, ranting and raving about the neighbor's car in your driveway. This idiom is a redundancy, since rant and rave mean just about the same thing, but probably survives on account of its alliterative appeal.