This is the 6651st most frequent Portuguese word.
flu
"Flu" in Portuguese means "flow" in English.
Here, 'flu' refers to the common viral illness.
Estou com flu desde ontem.
I have had the flu since yesterday.
In this context, 'flu' refers metaphorically to 'flow' or a situation moving quickly.
Com o flu passando rápido, não precisamos cancelar o jogo.
With the river flowing swiftly, we don't need to cancel the game.
'Flu' in this example represents the energetic progression or rhythm of the dialogue.