Different then shit or dingleberries, fuck nuggets are the wonderful droppings of shit found after sexual intercourse. When a person finds this wonderfu mess, the words stated are what are in the example
When playing poker and you have a amazing hand and just about to put it down just before you say kooshty fuck nuggets, and everyone knows they are beat.
Someone has put down there cards and have a pair of aces and they think they have one and den kooshty fuck nuggets and they no there beaten they hang there head in shame and you take the pot.