The phrase "are up in clouds" refers to someone who is daydreaming or not paying attention to their surroundings. The antonyms for this phrase would be "focused," "attentive," "present," "alert," "aware," and "grounded." Someone who is focused is paying attention to the task at hand and is not distracted by their thoughts. Being attentive means that one is aware of what is happening around them and responds accordingly. To be present means that someone is fully engaged in the present moment and not lost in their thoughts. Someone who is alert is aware of potential danger or opportunities. Being grounded indicates stability and being firmly connected to reality.