Don’t do this! (I’m not sure if you’re just joking though)! It would be better to just reset your account if you’d like an easy way to clear your queue. The idea is to schedule items based on your memory of them. If you mark things correct that you don’t remember, they are going to be spaced out with the assumption you remembered it.
The best way to handle a large queue (in my opinion) is to make sure you aren’t adding new words until the queue is low / manageable, and to set a specific amount of time each day that you can commit to without going under or over. Ideally the maximum amount of time you’ll know you will be able to commit to. As long as you spend the same amount of time each day without missing a day, and you’re not adding new items, the queue will start dwindling down though it will take some time.
If you’ve been away for awhile and feel like you might have forgotten a lot of things, really resetting your account isn’t that big of a deal. It won’t delete your custom lists, definitions, or mnemonics, and you can always mark something as “too easy” if you know it well (or even ban it if you know it so well you don’t need to be bothered with it)! That might be a good solution for somehow who gets overwhelmed by seeing a large review number, and it feels really good to be able to get the queue down to 0 daily.