It can also be interpreted as "going out today and tomorrow".
Here's a breakdown:
* "pa la calle": This is a slang way of saying "to the street" or "out on the street". It's a very casual and common phrase.
* "hoy": means "today".
* "y mañana": means "and tomorrow".
So, the phrase as a whole means that the person is going out on the street both today and tomorrow. This could be for any reason: going shopping, meeting friends, going for a walk, etc.