Definitions by War Master

Tujunga 

An ancient Samoan war challenge. It is completed by hitting each side of your chest with the opposite hand, and then shouting, in a deep, war-like voice "TUJUNGA!" The performer of the challenge must look the opponent directly in the eyes while performing it.

Person being challenged: "Your mom is a whore."
Challenger: After hitting chest "TUJUNGA!"
War will then ensue.

Tujunga by War Master August 6, 2012