Underground rap group, and one of the best in the biz, most commonly known due to the fact that popular rap star "Eminem" blatantly stole the rap style of one of the members of Blackalicious.
Person 1: "Why didn't Rachel come to worktoday?"
Person 2: "Haven't you heard, she got blackmaled by Ta'Quante last night."
Person 1: "One must always take care when getting blackmaled."
A blackade is a very largecrowd of black girls and/or guys blocking a hallway in school or any other place. It can be very annoying at times when trying to get to somewhere in a hurry, especially when they start yelling at you for no other reason than getting knocked over by themselves.
Bob: Man, I really have to get to math class. O crap Its a blackade!