Qadiani or Qadiyani (قادیانی qādiyānī in Urdu and Arabic) is a derogatory religious slur used by some South Asian Muslims to refer to the Ahmadi Muslims, primarily in Pakistan. While it is pejorative to the Ahmadiyya Muslim Community, it is used in official Pakistani documents.
Etymologically the term refers to residents of Qadian, a small town in northern India, the birthplace of Mirza Ghulam Ahmad, whom the Ahmadis consider to be the promised Messiah and Mahdi. As such, the majority of the Qadianis are Hindus, whilst a small number are Ahmadi Muslims and Christians. The term may sometimes be used to distinguish between the main Ahmadiyya movement and the Lahore Ahmadiyya Movement, a splinter group, primarily by the latter and other Muslim groups.