get back to me,

A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.

Someone who is inferior, low class, has to "answer back" to people above them

Derived from Cheerleading:
The captain of the cheerleading team leads the others:
Captain: "Give me a "B"
Team: "B"

Given special meaning by Gwen Stefani's Hollaback Girl

Someone who allows people to treat him/her like a doormat and walk all over him/her.

Invented by Gwen Stefani in her song "Hollaback girl" where she repeats she isnt a hollaback girl and clearly she means it.. she's the moneymaker.

or
call me back latr
hit me up

This term can be used as an goodbye greeting or when ending a conversation or at the end of trying to prove a point.

after a farewells been made you say this to the other person