Green’s Dictionary of Slang

tru-ana excl.

[SE true + Maori ana, behold!]

(N.Z. gay) general term of affirmation.

[NZ]W. Ings ‘Trolling the Beat to Working the Soob’ in Int’l Jrnl Lexicog. 23:1 73: [T]ru-ana was an affirmation that meant, ‘I absolutely agree with you’, or ‘This is self evident’.