Idiom Definition:
  
    
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"to get on your soapbox"  
  to give a speech about something you feel strongly about, often for a long period of time and on a subject that other people may not be interested in.
   
Synonyms:
convince, declare, decry, discourse, dissertation, espouse, harangue, lecture, orate, oration, persuade, pitch, proclaim, proselytize, rail, rant, sermon, speak, spiel, spout, sway, talk
 
 
This person has literally
 gotten on their soapbox. - - - - ->  
