NSFK
"Not Safe For Kids"

-Abbreviation used to describe any kind of media content/material (filled with violence, sex, nudity, and crude language) not suitable for children or teenagers to view. 
Daddy Cado: Did you see Borat?

Mommy Pam: Yeah, of course!

Mommy Diana: How was it?

Mommy Pam: It was good. I had a nice laugh but that shit was so NSFK. I will never allow my kids to see it. 