If there is a particularly noisy group, don't be shy to yell at them "calleu d'una puta vegada".
What would probably happen is that the people being noisy will appologize, try to be more quiet, forget about the incident after about 5 minutes, and go back to the previous amount of noise until some other neighbour complains.
calleu d'una puta vegada
There is at least two words, calleu, and vegada that don't exist in any Portuguese I've encountered. Also, d'una is... not something I've seen in Portuguese before.
But I'm a new speaker so I may be missing something.
I found this slang for shut the fuck up in Portuguese, not sure how cromulent it is: https://en.bab.la/dictionary/english-portuguese/shut-the-fuc...