Preach

Preach;

to have somebody speak up about a subject with an opinion that is very common and isn’t afraid to repeat it (they’re a preach)

Donald Trump is a nonce
PREACH

Donald Trump is racist
PREACH

preached out

An unsolicited message explaining your error and the consequences of said error.

The help desk preached out to me about my support ticket.

Preach floods to Noah

Advocate to someone an opinion or stance that s/he already holds -- preach to the converted -- push on an open door . . . with a flavour of "a bit of a waste of time and effort"

Turns out we agree on this, so I won't try to preach floods to Noah.

#preach

Agreeing with somebody but with a funny hashtag

nts has more admin abuse that rosi #preach