A dare that has no get-out clause. If you Black Dare someone, they can't back out of it, under any circumstances.
Person A: "I dare you to go chat up that fat bird at the bar".
Person B: "Well I BLACK dare you. That means you HAVE to do it".
Person B: "Well I BLACK dare you. That means you HAVE to do it".
by JoeyFromTheBlock June 22, 2011
by Joeyfromtheblock March 11, 2015