sub-saharan blockade
When a group of Sub-Saharan, black, kids walk hella show in the hallway with all their niggas, and decide to take up the whole hallway. They may or may not do this unintentionally, but make the hallway impassable.
Teacher "Why are you late to class?"
Student "I got caught behind a Sub-Saharan Blockade"
Student "I got caught behind a Sub-Saharan Blockade"