A music stand whore (or hog) is a musician in a band, orchestra, or chamber group who hogs the music stand.
This person will have their own stand and won't share, while others are two or even three to a stand.
In worst cases this person will be using multiple stands for their stuff.
Why do those flutes have their own stands? We're three on a stand here! Those music stand whores.
Conductor: Stop being a music stand whore!