shopvac
A shopvac is a person who is exceptional at sucking, not sucking in a sense of being horrible, but sucking in a sense of sucking dick.
She's the biggest shopvac around.
reverse shopvac
Where you are receiving oral sex and vomiting at the same time.
Ya i totally got a reverse shopvac with this chic, she was covered in throwup.
shopvacing
When a classy, yet adventurous woman gentally places her lips around a mans anus to create a vacuum like seal. She then proceeds to violently suck the shit into her mouth.
I was at confession the other day and my penance was to allow the nuns to enjoy shopvacing my ass!