The phrase "counted chickens" is used to caution against assuming something will happen before it actually does. Antonyms for this phrase could include "stay grounded," "be realistic," "temper expectations," or "don't jump the gun." Essentially, the opposite of counting chickens is to avoid making assumptions or predictions without concrete evidence to support them. One might use these antonyms in a situation where someone is getting overly excited or confident about an upcoming event or outcome, reminding them to remain level-headed and prepared for any possibility. By using antonyms like these, it's possible to help someone avoid disappointment or false hope.