What is D.f.i.?
1.
Different Fucking Idea- when a plan changes- the original idea is Spanished and the cry of "D.F.I." goes out.
" D.F.I. on that! We're doing something else."
See
2.
Drug F*cked Idiot-a drug user-use to refer to anyone who is totally drug effected or DRUG F*CKED
"That guy she's seeing is a total D.F.I."
See