To speak agressivly about somthing. or to take your own tangent about a subject and talk for a long time in a passionate manner. also see Aitkenism.

To suddenly give a long speech that usually results in rambling and repeating of nonsence.

The extensively talk about a given topic longer than needed whether anyone cares or not

When someone is pissed about something and they rabmle on about it.

;Expressing opinions in a rambling or agravated manner.

;A spell of ranting; a tirade

The ugly and distorted sound of two notes, an octave apart, coming out of a brass instrument (such at a trombone or french horn), by accident, at one time.

--1.
-a novel by Chuck Palahniuk (author of Fight Club)

--2.
-the titular character of the novel of the same name. His real name is Buster L. Casey but his nickname "Rant" came from a childhood prank involving animal organs which resulted in numerous people getting sick. As each person threw up, they made a sound that resembled the word "rant," which became a local synonym for "vomit" and Buster's nickname.
He starts a tooth fairy scheme involving gold pieces which changes the economy of his town, deliberately gets bitten by spiders, snakes, coyotes, etc. until he gets rabies, spreads it other ppl and then moves to the big city where he participates in a demolition derby known as "Party Crashing".

--3.
-to throw up or vomit. originates from the book "Rant".