What is Shop Vac?
1.
When a dirty, talented tramp stuffs you're entire package (balls and all) into her mouth, and blows you with amazing suction power.
I found a nice shop vac last night.
See
2.
When a girl is that big of a slut, shes sucking dick like a shop vac. Or when you suspect a guy using a shop vac in order to fulfill his needs
Whoa, shes a shopvac.....or.....Hey shopvac, did it cut ur dick off last night?