A lot of people use that term to describe a connection between a mother and her grown children

Like when my mother whome I only live with during breaks and who doesn't pay for my school or food or anything calls me at 3 am and tells me to go home (not her house, my house mind that).

It' silly because I don't live with her and haven't in a while, but she still tries to act like I have a curfew.

And that's when I say "Cut the umbilical cord please"