It derives from "sister" and "manager". It refers to a sister who servers as a manager to her siblings.
A sistager will tell you exactly what to wear and how to speak.
My sistager answers calls on my behalf.
My sistager answers calls on my behalf.
by Lebanesegov September 09, 2022
a mildly ghetto term for friend who is a girl, expresses that you consider this person a friend can even be used aggressively in an argument.
by Miha Bassinet September 15, 2020