"No matterhow you cut it" is an english expression. It means that no matter the choice of statistics the deaths per day in brazil are very high.
One way to report the numbers is say how many deaths were registered into the system each day. This is the "freshest" statistic you can get, but it mixes data from different days. This statistic can't be used to plot a pandemic growth curve but it can be used to keep track of the total number of deaths.
Another way to measure it is so count the number of people that died on each given day, no matter how long it took for the death was registered into the system. This statistic is different from the first one but but it should be in the same order of magnitude (given that the first statistic is approximately a rolling average of the second one)
The key limitation of the second statistic exact number can only be known after at least a week has passed, because of the time it takes for the deaths to be added into the system. This is where the government's dishonesty comes in. They wanted to change the daily reports so that they would only include deaths that were added to the system in the same day where the person died. Any deaths that were not reported in the same day (which is the majority of deaths) would be left out of the statistics entirely.