›COMMERCEthe act of arguing about the price of something in an attempt to make the seller reduce it: haggling over/abouthaggling between sb/sth and sb/sthHaggling between the company and investors over valuations will continue until the price is announced.
›the act of arguing about the details of something: haggling over/about sthSome of the member states find themselves involved in endless haggling about their voting rights within the EU.bureaucratic/political/public haggling