Hable y hable

Here's an informal grammatical construction I have never seen described in a textbook.

• Estuvo pregunte y pregunte. He kept asking and asking.
• Le estuve toque y toque y no abrió. I knocked repeatedly but he never answered.
• Estuvimos en la madrugada hablando y hablando y hable y hable y hable. We talked into the wee hours of the night.
• Hoy mis compañeras de la escuela estuvieron insiste e insiste. Today my classmates just kept insisting. (overheard at the gym)
• Desde hace rato te oigo chille y chille. I've heard you bawling for a while now.
• Estás trague y trague y trague. You're stuffing your face (with food).
• Estoy llore y llore. I can't stop crying.
• He estado piense y piense en él. I can't stop thinking about him.
• Estuviste tose y tose. You were coughing a lot.
• Estuvieron coge y coge. I couldn't sleep because the couple in the next room was having sex the whole time.
• Estabas chingue y chingue. In my dream you wouldn't stop bugging me.

Some observations:

1. The first verb is often estar, rendered in the preterite.
2. The second verb describes an action that is repetitive or continuous.
3. The action is often annoying or unwanted: crying, shouting, asking too many questions.
4. The form of the second verb is not present subjunctive. You can see this by considering those verbs ending in -er or -ir: tose y tose, coge y coge. You don't say: *tosa y tosa. The ending is always -e, regardless of whether the infinitive ends in -ar, -er or -ir.

From this last point, we can conclude that this is an inflectional form distinct from those of the verb paradigm of the standard language.