Mangalho = dick (portuguese from Portugal)
You can use it to when it gets hard or sum shit idk but yeah it means dick... You can say mangalhão too which means big dick.
Eu: "Quando te vejo até o mangalho reluz!"
Ela: "Que mangalho caralho?"
Eu: "😢"
Ela: "😊"
Que mangalho!(what a huge dick) mangalho do caralho!(fucking huge dick) chupa-me o mangalho!(suck my big dick)