
Manglik Dosha in marriage, more commonly known as Mangala Dosha, is an astrological belief among the Hindus. According to Astrology for marriage, it is the most well-known Dosha, affecting both men and women. A Manglik refers to the person born under the planet Mars (referred to as Mangal in Vedic Astrology).
A Manglik is more likely to suffer from misfortune and detained marriage. They are highly unlikely to have a steady wedding because of their unreliable, violent and argumentative nature. According to Astrologers, Mars is the most hostile planet, and therefore, its nature is contemplated as Manglik.
SOURCE - https://www.mytirthindia.com/blog/