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To go on about something in a positive and sharing manner.
1. "Ok here is a harp on, they are selling $1 pots all night at the Grace!"

2. "I can't stop harping on about how awesome that show was"

3. "Oi, Danni tell Sheila and her friends to get their harp on, they look depressed".
by LadyLadyMcSunshine March 21, 2013