What's the meaning of the phrase 'Harp on'?
To repeatedly and boringly speak about a topic.
What's the origin of the phrase 'Harp on'?
This term is known from the 16th century. A quotation from a 1562 work is included in Apol. Private Masse, 1850:
"The great matter you harp on."
Shakespeare also used it later in Hamlet, 1602:
"Still harping on, my daughter?"
See other phrases and sayings from Shakespeare.