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1.
a world populated by the Tau. Different septs yeild different castes.
The Tau sept world of Vior'la is famous for it's fire warriors.
by royland Douchebag November 12, 2003
 
2.
To nail somebody's woman for the purpose of revenge. A more aggressive version of the antique word "cuckold".

Often used derisively to describe a rebound relationship.
I'll sept you, bitch!
by Nim July 02, 2004