"Cozu" meaning

Hi everyone, i was asked to translate a text, but i am stucked on a word which meaning i just can´t understand.

Please, can you clarify me what does "cozu" mean on this sentence?

"A twinge of guilt annoyed him. He’d been stunned enough times to know
she’d have a vicious headache when she woke up.

But what other choice did he have? She seemed to be a determined
little cozu.

Shaking his head in bitter amusement, he knelt beside her to check
her pulse. Satisfied he hadn’t hurt her, he took a good look at her
peaceful features. (...)"

Thanks in advance!

Hi Philli: I am not familiar with the word but according to urbandictionary it is slang.

In this context I would guess it would mean something like immature and/or dumb, in an somewhat affectionate or amused way.

1. Cozu

Nickname given people who have no testicles. Usually of mexican decent. Mentaly retarded on most cases
holy shit! everybody hide your weed... cozu is coming
gay immature stupid dumb mexican


Reference: http://www.urbandictionary.com/define.php?term=cozu

Hi, Vicente. Thanks a lot for your help!