The phrase "most under-the-table" refers to actions or transactions that are typically considered to be dishonest or illegal. Some antonyms for this phrase include "above board," "legal," and "ethical." These words are often used to describe actions or transactions that are conducted openly and honestly, without any hidden or secret agendas. In business, for example, conducting transactions above board means that everything is transparent, legitimate, and compliant with all relevant laws and regulations. By contrast, conducting transactions under the table implies that something illegal or unethical is taking place - a situation that can have serious consequences for all parties involved.