The phrase "till cows come home" is commonly used to describe a situation that lasts for an extended period. Antonyms for this phrase could include "briefly," "temporarily," or "momentarily." These words signify a situation that is short-lived or has a limited duration. Other antonyms could be "occasionally," "infrequently," or "sporadically," which suggest rare or occasional occurrences rather than a continuous action. In contrast to "till cows come home," antonyms like "soon," "quickly," or "immediately" express a sense of urgency, implying that an action will happen quickly rather than being prolonged indefinitely.