The phrase "hash over" means to discuss thoroughly, but there are several antonyms that can be used to describe the opposite action. One antonym is "ignore," which means to pay no attention to something. Another antonym is "dismiss," which means to reject or decline something. "Neglect" is also an antonym, which means to not care for or pay attention to something that needs attention. Lastly, "abandon" is an antonym for "hash over," which means to give up or relinquish something completely. These antonyms illustrate the opposite of discussing a topic in depth, highlighting different ways in which we can choose not to engage with a subject.