A guy that knows where all the best glory holes should be, and thus puts them there for himself and others to enjoy.
A handyman or carpenter that knows how to make the cute little holes in restroom walls.
Can also be known as a double agent that works more than one hole at once, or goes from glory hole to glory hole with an insatiable appetite for cock! See Glory Hole Orgy.
All those glory holes are manned by a glory hole mole, don't just stand there! Go get some cock boy!