This is the 9424th most frequent Polish word.
wf
Physical education.
In this sentence, 'wf' stands for 'Wychowanie fizyczne', which means 'physical education' in the school context.
Dziś mamy wf na świeżym powietrzu.
Today we have physical education outdoors.
Here, 'wf' is used as an abbreviation referring to the school class where students participate in physical education activities.
Nie zapomnij swojego stroju na wf.
Don't forget your outfit for physical education.
In this context, 'wf' is used to refer to the subject and role of the teacher specializing in physical education.