The word chocabas is the imperfect form of chocar in the second person singular. There are other translations for this conjugation.
See the full chocar conjugation

chocar

¡Sí, porque no importaba si lo chocabas!
Because it didn't matter if you hit it.
Si vos no chocabas andabas mal, porque entonces no tenía sentido andar en la montaña.
If you didn't clash you were going wrong, because it meant there was no sense being in the mountains.
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