The term "hast in mind" refers to having something in one's thoughts or intentions, typically with a sense of urgency or haste. Antonyms for this phrase would include words such as forget, neglect, or ignore, which suggest a lack of attention or concern for the matter at hand. Other antonyms might include words like deliberate, ponder, or consider, which suggest a more thoughtful or intentional approach to decision making. Ultimately, the choice of antonym will depend on the context in which the phrase is being used, as well as the speaker's intent and tone.