We've found 3 phrases for soapbox (0.116 seconds):

on one's soapbox »    Stating or professing one's opinion; attempting to persuade others of something.

soapbox »    A crate for packing soap, or, by extension, any inexpensive crude platform raised above the surrounding level to give prominence to the person on it, especially when used for speeches.

soapbox »    Especially when only tangentially relevant to an ongoing discussion.

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