An alternate form of a "slut" or "whore" in social terms of females. However, it can be used to describe a friend or foe by using it as an insult.
A woman who sucks so much male genitalia she resembles a vacuum. Evidently the vacuum was made for sucking.
Chewbacca: I used to go out with Crystal, she was a real man stick sausage lover.
Jackson: Yeah, I heard she was a real deal Cock Vacuum.
Chewbacca: It was like I had a Hoover Vacuum attached to my cock every minute of the day.
Jackson: Amen!