The phrase "cashed on" means to profit or gain from a particular situation or event. Antonyms of this phrase include "missed out" which means to fail to take advantage of an opportunity, "lost money" which refers to experiencing financial loss, "squandered" which denotes wasting resources or potential gains, and "fell behind" which implies falling short in reaching a desired outcome. Other antonyms include "returned empty-handed" which is failing to achieve a goal, "lowered profits" which refers to a decrease in earnings, and "failed to capitalize" which denotes missing the chance to make the most of an opportunity.