The Hole in the Underwear Gang
Wikisimpsons - The Simpsons Wiki
The Hole in the Underwear Gang is a club for boys in Springfield.
History
Bart, Martin, Database, Milhouse and Nelson is members of the The Hole in the Underwear Gang. Their headquarters are in Bart's treehouse. Under one of their meeting was the treehouse destroyed after they spying on Lisa and she discovered it.