keep on about
• speak about something repeatedly.
• "they kept on about negotiating an end to the war"
Similar:
talk constantly,
talk endlessly,
talk repeatedly,
keep talking,
go on,
go on talking,
go on and on,
dwell on the subject,
refer to repeatedly,
repeat oneself,
ramble on,
rant on,
harp on,
witter on,
rabbit on,
