Idiom: Lose One's CoolCheck definitions of...loseonescoolMeaningsHow to pronounce "lose one's cool":AU Your browser does not support the audio element. To become upset or disconcerted; to lose one's temper.A-Z ProximitiesLord's SupperLord willing and the creek don't riselose facelose groundlose it lose one's cool lose one's headlose one's mindlose one's shirtlose one's temperlose one's touchSimilar Idiomslose one's coolcool one's heelskeep one's coolbefore it was coolcool catcool headice coolkeep a cool headplay it coollose one's headlose one's mindlose one's shirtlose one's temperlose one's touchlose one's witslose the number of one's messbe someone's to loselose facelose groundlose itSimilar Phraseslose itlose sight oflose trackcool downcool itcool jazzcool mediumcool off