Tribe 09 Share definition Flag A group of students from sachem north hgh school who run the school. every person outside of "the tribe" hates them. but they dont care cause they would rather have fun. Man that party that i went to with tribe 09 was insane Tribe 09 by tribe 09 June 8, 2009 0 0 Get merch Get the Tribe 09 mug. Buy Now — $32.95 See more merch