LOL actually "dev/null" was the destination folder we set up as default for directing all emails collected by a webhosting account "catch all" email address to keep the mailbox from filling up & consuming the hosting account's allocated space on the server...
Well I am asking because the term is often called "piping to /dev/null" but you can't actually pipe "|" processes to /dev/null. The correct usage is $ command > /dev/null or "redirecting to /dev/null."
So it's a convenient shorthand, but not technically true that you can "pipe to /dev/null" because /dev/null is not generally executable.