harp on

US /hɑːrp ɑːn/
UK /hɑːrp ɑːn/
"harp on" picture
1.

insistir em, martelar em

to talk or write persistently and tediously on a particular subject

:
He keeps harping on about the good old days.
Ele continua insistindo nos bons velhos tempos.
I wish she wouldn't harp on my mistakes.
Eu gostaria que ela não insistisse nos meus erros.