A way one can dismiss concerns and/or animosity others have towards them. Can refer to practically anything, but usually is reserved for illicit or illegal things.
Moneesha: "I'ma have sex with whoeva I want! It don' even matta!"
Tyra & Monique, Moneesha's Friends: "You need to stop Moneesha! You're going to end up dead or with a disease. We're really worried about you."
Moneesha: *waiving hands and pointing fingers* "Whateva! Whateva! Y'all don' know me! Y'all don' know me!"
A way of tellin them not to front cuz they don't know shit about u, know what im sayin?
Aw bitch you best believe I ain't no whore!! Y'all don't know me! Y'all don't know me!
You aint no friend of me.
"I know you from somewhere." "You aint no friend of me."