Green’s Dictionary of Slang

TC n.

1. (N.Z. prison) a promiscuous woman [tunnel cunt; ‘she experiences a lot of “traffic” ’ Looser 2001].

[NZ]G. Newbold Big Huey 255: TC (n) Unfaithful woman, harlot.
[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 185/1: TC abbr. 3 an unfaithful or promiscuous woman.

2. (N.Z. prison) a dark-skinned (M?ori) woman.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 185/1: TC abbr. 1 a dark-skinned (esp. M?ori) woman.

3. (N.Z. prison) a tough male prisoner [tough cunt].

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 185/1: TC abbr. 3 a person who is strong, tough and brave, a ‘hard man’.

4. (N.Z. prison) a tough male prisoner; the most important inmate on a wing [tough cunt / top cat].

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 185/1: TC abbr. 3 a person who is strong, tough and brave, a ‘hard man’ [...] 4 the top man, the most powerful and influential inmate in a wing.

5. (N.Z. prison) a miser [tight cunt].

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 185/1: TC abbr. 5 a miserly inmate.