A "politically correct" alternative to "motherfucker", apparently for using when you want to swear at a woman. (Yes, apparently, you can be PC and still swear - as long as you don't imply a masculine standard of sexual normality by using male-gendered swear-words against women).
It implies the "engulfing" of the dick in the fanny.
Actually, I think this is quite a cool insult, PC or not. It is especially good because you can use it against PC people.
Insult to describe someone who's addicted to cocksucking. Also an insult for someone that acts in a submissive way, basically kissing ass so hard they might as well be inhaling it. This is for that person who's desperate to please, willing to do anything (even the dumbest shit) just to get on someone’s good side.
Mary is such a cock engulfer... She's always slutting around in search for a cock to engulf herself in.
Dave will do anything for a promotion—he's such a cock engulfer for the boss.