(Acronym)
The easiest way to summarize and define hardcore club hip-hop rap music: "Nigga-This-Fuck-That Music" as in, you will likely hear those phrases in this music. Contrast with pop / top 100 "dance music" like you typically get from Akon, Lady Gaga, Katy Perry, etc.
Often a nice jesture of a guy will be mistaken by a girl for a cheesy action to get in her pants. NTTFU will get rid of the mistaken thoughts, so that the jesture can be seen as the pure friendly jesture that it is.
(text messaging)
Kim: "Tim, i'm so sick today. I feel like my head is burning up"
Tim: "Ah, do you want me to bring you some freshly squeezed orange jus?"
Kim: ".. no thats okay"
Tim: "NTTFU!"
Kim: "oh, come on over!"