NFBSK

NFBSK

slang An initialism of "not for British school kids," used as a humorous placeholder for an expletive. Sometimes conjugated with -'d or -'ing when used in place of conjugated verbs; sometimes spelled in lowercase letters. Now, why in the NFBSK would I agree to that? Someone in the art department really nfbsk'd up this illustration.
Farlex Dictionary of Idioms.
See also:
  • DYSWIDT?
  • DYODW
  • DYJHI
  • DYJHIW
  • Fanny's your aunt
  • come in
  • come in a certain position
  • come on in
  • be (flat) on (one's) back
  • (Is) that everything?