Suppose you have a lot of holds placed and you are about to go away for a couple of weeks. Or suppose you have a lot of books already checked out and you are secretly hoping that none of your lots of holds are going to come in soon. You can actually control the flow, similar to how you can manipulate your Netflix flow.
Log into your record, display your holds. Notice the row of checkboxes along the right side of the list. Check the ones you want to freeze, and then click on "Update list". What will happen is that the system will skip over you when your turn comes up, but later when you unfreeze them, you will return to your place in the queue.