Leech Boy Share definition Flag One who can't code mIRC on their own so they lach onto a well to do coder's nut sack and leeches off that person's skills as if they were their own. Did you see that code Neptune posted.. Yeah you can tell he is being a Leech Boy again. Leech Boy by Lazy_one January 15, 2009 0 0 Get merch Get the Leech Boy mug. Buy Now — $32.95 See more merch