From Longman Dictionary of Contemporary EnglishI’m easyI’m easyspokenDON'T CARE used to say that you do not mind what choice is made ‘What would you like to do now?’ ‘I don’t know, I’m easy.’ → easy
Examples from the CorpusI’m easy• "Do you want to stop at the mall now or on the way home?" "I'm easy."• "Do you want to watch the news or the late night film?'' "I'm easy.''