Making a deal is a commonly used phrase that denotes the agreement or negotiation process between parties. Antonyms for this phrase could include avoiding, rejecting, or ignoring a deal. In these instances, parties may choose not to enter into any negotiations or have already made the decision that the proposed deal is not beneficial to them. Another antonym could be dissolving or terminating a deal, indicating that a previously agreed-upon deal has been cancelled or terminated. Ultimately, there are various antonyms for making a deal, depending on the context and what the parties involved may prefer.