Bart's Girlfriend

Fixed intensifying phrase. 'Tuétano' is bone marrow, so the image is something going all the way inside. Used across Latin America to emphasize that a quality is total and deep, either positive or negative.

Stronger than simply not wanting to do something. Signals a blunt, slightly defiant refusal. The phrase 'no me da la gana' is the most common form and carries a tone of 'I simply won't, end of discussion.'

Compositionally transparent but used here with deliberate irony: the speaker announces in advance that they intend to do something poorly as a form of quiet rebellion. Context-dependent tone.