2. Phrase sometimes included in a communication to convey to listeners/readers that the speaker/writer is not joking, and will back up what they're saying with facts or fists. (see example in definition # 8).
3. Phrase commonly used by jackasses who think it makes them sound serious, hard or knowledgeable.
Actual conversation on facebook btwn 2 moms about the apparent size of their fetus' dicks in ultrasounds:
Sharrell: He aint got shit on my sons when I was pregnant...lmao seriously.
Pretty: Man stop playin ma son's dick iz goin to be big azz fuck lol real talk.
Phrase popularized by R. Kelly in his song "Real Talk" (look it up) meaning true or for real. It can be used more lightly to simply mean really, das da truf or ya you heard me, bitch.
R. Kelly: Girl, my momma ain't gotta screen no calls from me, real talk. And watch yo mouth.
R. Kelly: They don't eat with us! They don't sleep with us! Besides, what they eat don't make us shit! Real talk.