I think you've confused yourself :p it's not called "blackordering" but rather "backordering" and the word itself is self explanitory

Everyone uses that word and knows what it means. It's basically putting a order on a domain, which is set to expire soon. So you "backorder" it ahead of time to increase your chances of succesfully aquiring it.

I still haven't backordered it and might wait a bit. I believe it's still ing race period.