Making a fuss refers to acting in an overly dramatic or attention-seeking manner. Some antonyms for this phrase would include being calm, composed, or collected. Other antonyms could include being nonchalant, indifferent, or unconcerned. These all imply a lack of emotional intensity or urgency, and a willingness to let things play out without excessive intervention. Being discreet, restrained, or subdued might also be antonyms, as these terms suggest a measured and controlled response rather than an outburst of emotion. Ultimately, antonyms for making a fuss describe a mindset that favors composure, control, and equanimity over emotional outbursts or exaggerated behavior.