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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.
Definition of 'mood swing'. Word Frequency. mood swing (muËd swÉªÅ) noun. psychiatry. a sharp and inexplicable change in mood. He'd felt a kind of relief at not having to deal with her mood swings and erratic behaviour any longer. Example sentences containing 'mood swing'. The hormones in contraceptives sometimes affect libido and mood swings. The Sun (2015)