get on your soapbox

US /ɡet ɑn jʊər ˈsoʊp.bɑks/
UK /ɡet ɑn jʊər ˈsoʊp.bɑks/
"get on your soapbox" picture
1.

滔滔不绝地发表意见, 慷慨陈词

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.
他一喝点酒就喜欢滔滔不绝地发表政治观点。
Please don't get on your soapbox about environmental issues again; we've heard it all before.
请不要再滔滔不绝地谈论环境问题了;我们都听腻了。