The phrase "selling on" usually refers to marketing, advertising, or promoting a product or service. However, there are many antonyms that reflect the opposite of selling on. Examples include "not marketing," "not promoting," "not advertising," "not pushing," "not persuading," and "not convincing." These antonyms suggest that instead of actively promoting a product or service, one may be ignoring, disregarding, or avoiding it altogether. They may also indicate a lack of interest, awareness, or confidence in the product or service being offered. Whatever the reason may be, the antonyms for "selling on" can help identify a situation in which marketing efforts may not be effective.