get on your soapbox
US /ɡet ɑn jʊər ˈsoʊp.bɑks/
UK /ɡet ɑn jʊər ˈsoʊp.bɑks/

1.
nutuk atmak, vaaz vermek
to express one's opinions, especially on a controversial subject, at length and with strong conviction, often in a public or prominent way
:
•
He tends to get on his soapbox about politics whenever he's had a few drinks.
Birkaç içki içtiğinde siyaset hakkında nutuk atmaya meyillidir.
•
Please don't get on your soapbox about environmental issues again; we've heard it all before.
Lütfen çevre sorunları hakkında tekrar nutuk atma; hepsini daha önce duyduk.