The phrase "having willies" refers to a feeling of nervousness or fear. There are various antonyms for this phrase, including "calm," "relaxed," "brave," "confident," "fearless," and "unconcerned." When a person is calm, they are composed and collected, without any visible signs of anxiety or nervousness. Being relaxed means having a sense of ease or comfort, without any tension or worry. Being brave or fearless implies a lack of fear and the ability to face challenges head-on. Confidence encompasses a strong belief in oneself and one's abilities. Lastly, being unconcerned means being indifferent or apathetic, without any emotional reaction to a situation.