A hybrid of SDFC and X (which means suck it). Basically saying Suck Dick for Coke. Works best if used the motion of crossing your hands over your crouch to show them what needs to be sucked.
Can be used as XDFC, but three X’s seems to have a better effect.
Drew: Hey Steve you stank
Steve: How you know?
Drew: All those chicks were laughing at you, XXXDFC (while doing the arm jesture)