an expression used to describe a scenario in which elaborate or "over-the-top" preparations/decorations are set-up for particularly special groups or individuals.
Person 1: "Wow...look how lavishly this office is decorated!! This guy must be really important!"
Person 2: "Well you know, they don't bring out the bag pipes for just anyone..."
the process of spreading the female buttcheeks and giving it oral pleasure with tongue and air blowing actions. All while giving the female pleasure in her vagina via the hands and fingers. These actions combined resemble playing the bag pipe. And since anal oral can be messy, the bag pipe is indeed dusty.
The male on female equivalent of a rusty trombone.