The phrase "no ifs ands or buts" is often used to indicate an absolute answer or decision, without any possibility of debate or compromise. To describe the opposite of this, we can use antonyms like "flexible," "open-minded," or "pliable." These words suggest an attitude of willingness to consider different points of view or options, rather than a rigid adherence to one idea. Another antonym could be "uncertain" or "indecisive," indicating a lack of definitive or confident opinion. Overall, the antonyms for "no ifs ands or buts" imply a willingness to adapt, revise, or compromise based on the situation at hand.