Ah, the "Disco Butcher" ... you can not miss the ridiculous flashing lights that beckon you into this place.
This place can be a little overwhelming, especially if you don't speak Portuguese, but they have good selection and incredible prices. This is not the butcher to go to if you want advice on the best way to cook your meat or to have something cut to your specifications (although I imagine if I spoke Portuguese I might have a different experience here, many of the staff don't seem to speak great english) but it has everything you could need at great prices. Seems a bit pricier than Il Nosso Talho up the street, but better selection of meats (Il Nosso Talho has much more in the way of grocery though.)