购物狂指完全不加思索地购买各种超过生活所需的物品，如衣物、小装饰品等，该种现象较常出现于女性，尤其在各大商场掀起打折狂潮的时候。

近年，世界各地的社会逐渐鼓吹消费，加上社会压力越来越大，引致部份人尝试以大量购物减压，形成购物狂的社会现象。购物狂渐渐被认为是一种心理学的疾病，有心理学家尝试以药物控制购物狂的购物习惯。在香港，有人因为购物狂，以信用卡大量签帐，成为卡奴，引致被迫辍学、破产，甚至盗取他人信用卡签帐等犯罪行为。

2006年，香港导演韦家辉曾执导电影《最爱女人购物狂》，以夸张手法探讨购物狂这种社会现象。

Compulsive buying disorder (CBD), or oniomania (from Greek ὤνιος ṓnios "for sale" and μανία manía "insanity"), is characterized by an obsession with shopping and buying behavior that causes adverse consequences. According to Kellett and Bolton (2009, p. 83), compulsive buying "is experienced as an irresistible–uncontrollable urge, resulting in excessive, expensive and time-consuming retail activity [that is] typically prompted by negative affectivity" and results in "gross social, personal and/or financial difficulties". Most people with CBD meet the criteria for an axis II disorder. Compulsive shopping may be considered an impulse control disorder, an obsessive-compulsive disorder, a bipolar disorder, or even a clinical addiction, depending on the clinical source.