Pirate Duck Mafia is a group of people who follow the calling of pirate ducks.
Nobody knows their exact identities or how many members are in the group, but what is known is that one should never turn their back on a member or you will suffer the consequences.
The Pirate Duck Mafia despises rats and will stop and nothing to drive every last one of those fuckers into the ground.
"Hey, do you know who the Pirate DuckMafia is?"
"No clue, but hearing that name just made me pee a little in my pants"
"Me too :("
The word duck is an abbreviation of the term 'Silent Duck' which refers to the shape made by the hand during fisting, or initiation into fisting. Silent Duck
And so the term cheeky duck refers to slyly slipping a silent duck in during sex, aimed to catch the receiver off guard.