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Quick Answer. In a psychological context, labile mood refers to a mood state in which a person experiences wild, uncontrolled mood swings. Labile mood is also known as labile affect, emotional dysregulation and pseudobulbar affect.
Top Definition. labile. Flexible and ready to change, easily adaptive when the time comes. Slipjanko was a labile fellow, the guy got fired and was kicked out but two months later was back in action. #flexible #labil #rubber #flex #chill. by Adel7 March 28, 2009.