1) Bakery treat 2) Sweet bread 
Sticky buns are a dessert or breakfast sweet roll that generally consist of rolled pieces of leavened dough — sometimes containing brown sugar or cinnamon — which are then compressed together to form a kind of flat loaf corresponding to the size of the baking pan. Before the dough is placed in the pan, the latter is lined with the `sticky` i.....
Sticky bun is London Cockney rhyming slang for a son.