cult
kəlt/
noun
noun: cult; plural noun: cults

a system of religious veneration and devotion directed toward a particular figure or object.
“the cult of St. Olaf”
a relatively small group of people having religious beliefs or practices regarded by others as strange or sinister.
“a network of Satan-worshiping cults”
synonyms: sect, denomination, group, movement, church, persuasion, body, faction
“a religious cult”
a misplaced or excessive admiration for a particular person or thing.
“a cult of personality surrounding the leaders”
synonyms: obsession with, fixation on, mania for, passion for, idolization of, devotion to, worship of, veneration of
“the cult of eternal youth in Hollywood”
a person or thing that is popular or fashionable, especially among a particular section of society.
“a cult film”

Origin
early 17th century (originally denoting homage paid to a divinity): from French culte or Latin cultus ‘worship,’ from cult- ‘inhabited, cultivated, worshiped,’ from the verb colere .