Verb
cut the umbilical cord (third-person singular simple present cuts the umbilical cord, present participle cutting the umbilical cord, simple past and past participle cut the umbilical cord)
(idiomatic, euphemistic) To end a child's overdependence on or overattachment to their parents.
Synonym: cut the cord
In order for the oppressed to unite they must first cut the umbilical cord of magic and myth which binds them to the world of oppression; the unity which links them to each other must be of a different nature. Paulo Freire
In the theater, characters have to cut the umbilical cord from the writer and talk in their own voices. Irwin Shaw
Well, people got attatched. Once you cut the umbilical cord they attatched to the other things. Sight, sound, sex, money, mirages, mothers, masturbation, murder, and Monday morning hangovers. Charles Bukowski