A somewhat jocular and ironic insult somewhat similar to '
cocksucker'.
Most often directed at heterosexual male friends, it subtly and ironically implies that as the
target is clearly such a
bender, that being accused of cuntfuckery (i.e. heterosexual intercourse) will likely be considered an insult.
A: "
Oi, you spilled my drink.
Watch what you're doing, you stupid cuntfucker!"
B: "What! How
dare you call me that... Oh wait... You're right on both counts!"