Antonyms for the expression "gazing openmouthed" include words like disinterested, detached, unimpressed, indifferent, and uninterested. Instead of staring with open mouths, one could be bored, uncaring, or even disgusted by what they see. Other antonyms include focused, concentrated, attentive, and interested. While gazing openmouthed may convey a sense of awe or shock, its antonyms imply a lack of emotion or interest. By using antonyms to describe this phrase, we can explore the variety of reactions people have in different situations and the impact of body language on communication.