The antonyms for the word "not budget" can be numerous, depending on the context of usage. Some of the words that could be used as antonyms for "not budget" are extravagance, opulence, luxury, lavishness, indulgence, liberality, prodigality, and profligacy. All these words signify the opposite of budgeting, which implies managing expenses within a limited amount of income. These antonyms suggest a lack of restraint or self-discipline in spending money. People who do not care about budgeting would prefer to indulge in lavish spending, such as exotic vacations, high-end clothes, or expensive restaurants. Ultimately, it is essential to strike a balance between fiscal responsibility and enjoying the luxuries of life.