[get] on {one's} soapbox
1
to express one's strong opinions or beliefs publicly and forcefully, often in a long and impassioned speech
- He got on his soapbox and gave a passionate speech about income inequality.
- I'm sure he will get on his soapbox and speak out against the proposed changes.
- She often gets on her soapbox about environmental issues.
- While we were at the rally, several speakers were getting on their soapbox and sharing their stories.
- Don’t get on your soapbox at the party; it’s not the right time for such a serious discussion.
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