This is the 10532nd most frequent Portuguese word.
fixá
"Fixá" is not standard Portuguese, but it may be a colloquial or regional variation of "fixar," meaning "to fix," "to secure," or "to focus."
In this context, 'fixar' is used to mean attaching or affixing something to a surface.
Ela precisa fixar os pôsteres na parede antes da reunião.
She needs to attach the posters to the wall before the meeting.
Here, 'fixar' means to retain or internalize information in one's mind for recall.
Os estudantes devem fixar as informações importantes para os exames.
The students must retain the important information for the exams.
In this usage, 'fixar' implies focusing on details to imprint them in memory.