Sarcasm is often used as a tool to convey disagreement or disdain in a clever way. Some synonyms for "sarcastic wit" include dry humor, acerbic banter, cutting remarks, biting wit, sardonic commentary, snarky quips, ironic jabs, and caustic language. These terms all describe an individual who has a talent for expressing their opinions through sarcastic or ironic means. It's important to note, however, that while these traits can be entertaining and even endearing in certain contexts, they can also come across as irksome or disrespectful. As always, context and tone are key factors in communicating effectively.