hold forth
US /hoʊld fɔːrθ/
UK /hoʊld fɔːrθ/

1.
berucap panjang lebar, berkhutbah
to speak at length about a subject, often in a rather boring or pompous way
:
•
He loves to hold forth on politics whenever he gets the chance.
Dia suka berucap panjang lebar tentang politik setiap kali dia berpeluang.
•
The professor would often hold forth on his latest research findings.
Profesor sering berucap panjang lebar mengenai penemuan penyelidikan terbarunya.