1. Straight up, serious, factual
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
: 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.