pronounced "dee-ing my eff", as one would pronounce the letters "d" and "f". used to shorten the phrase "dicking my f-ck", which means to screw someone over.
scene is as such: you're trying to turn left in the left-turn only lane, and the guy in front of you is trying to get over to keep going straight, but traffic won't allow him in, so you're stuck behind him with no way of doing anything because the idiot isn't moving at all.
"ahhhh quit d-in' my f!"
alternately, try "don't d my f, south carolina!" (reffering to license plate)