"Cut a knife" means that when buying and selling things, the buyer asks the seller to cut a part on the basis of the original price, that is, the buyer asks to reduce the price on the basis of the selling price given by the seller in order to achieve his own satisfactory price.
The role of the knife is to cut vegetables, and extending the knife to the transaction is bargaining.
Similar words include:
1, "you can cut" means you can bargain.
2, "can be a knife" means that you can talk about a little price, such as whether you can use a knife, which can be understood as whether you can bargain.
3, "can be bold" means you can cut more points.
4. "Guan Gong Dao" is a seal.
5, "nail clipper" is cheap, meaning it.