play it cool
保持冷静、镇定自若，尽量不表现出过于兴奋或焦虑的状态
口语·保持冷静不露声色
英文释义
to remain calm, composed, or nonchalant, especially in a challenging or stressful situation
例句
He tried to play it cool when she walked in, but his face turned red.
典故来源
源于20世纪爵士文化，“cool”指冷静、不紧张的状态，强调在压力下保持镇定。