Related Clues:

• Sermonize
• Sound off, perhaps
• Harangue the crowd
• Spurt
• Eject, as lava
• Make a speech
• Eject, as molten lava
• Deliver a declamation
• Deliver an impassioned presentation
• Use the soapbox
• Go on at length
• Discourse
• Expel with force
• Get on one's soapbox
• Take to the pulpit