stacking
n.— «Donesha said one of the teens who was later wounded began flashing gang signs at the other group—a practice known as “stacking.”» —“2 students stabbed, 1 cut in knife fight near middle school” by Mike Glenn Houston Chronicle (Texas) Dec. 20, 2006. (source: Double-Tongued Dictionary)
Further reading
Amid court-ordered busing in the 1970s, a middle-school teacher tried to distract her nervous students on the first day of class with this strange assignment: find a monarch caterpillar. The result? A memorable lesson in the miracle of metamorphosis...
In 1971, when a new public library opened in Troy, Michigan, famous authors and artists were invited to write letters to the city’s youngest readers, extolling the many benefits of libraries. One of the loveliest was from E.B. White, author of...