One who sucks many a dick, much like a vacuum sucks up dirt. Most of the time it is a woman.
Example 1
Bill : I heard that broads a real human vacuum.
Franky : Yeah, she sucks a lot of cock.
Example 2
Bill (the cox) Clinton : Wow, i'll tell you, Monica is one hell of a human vacuum.
When you are fucking your partner who is on their period and you summon all your strength to turn your knob into a vacuum cleaner and suck up the period
An expression used by Niko Bellic in GTA IV to describe his cousins fake stories for example “Where’s luxury condo, Where’s sports car, where’s Barbara with BIG titties and Stephanie who sucks like a vacuum?”