cop: fuckin' jeeeesus mate, how fast were ya clockin'?  you: n.f.i mate, but it was fuckin' awesome
no fucking idea  normally used in conjunction with annoying workmates always asking you stupid questions that you know the answer to but refuse to give it to them anway
"cop: fuckin' jeeeesus mate, how fast were ya clockin'?  you: n.f.i mate, but it was fuckin' awesome" What is the definition of "n.f.i"?