To give a speech from (or as if from) a soapbox.
A talk about one's pet topic (or the topic itself), especially when only tangentially relevant to an ongoing discussion.
A soapbox car.
A crate for packing soap.
Any physical or media platform which gives prominence to the person on it and the views they espouse.
To give a sales pitch; to promote by speaking.
To talk at length.
A game of curling.
A lengthy and extravagant speech or argument usually intended to persuade.
An early form of rap music.