A very used slang in Belém, biggest city of the Pará State, in Amazon region, Brazil, for "my dick", as a non-offensive term. That slang is now spreaded in some areas of Brazil's North region.
In a situation when someone says to you that something is very, very big - e.g. "Wow, the screen i've bought is very big, man!" -, so you say: "Big is minha pêêêca". ("Big is my diiick"). It's said in a strong way, as a throaty powerfull shout made by a trashmetal singer.