It's when you give someone "props" or "dap" (positive recognition)not using the hands, but instead using apples. Yes the fruit. But at times you can use the actual Apple Computer.
Dap: Positive recognition.
Apple: Fruit and or Apple computer brand. (Rarely, but at times you may use Chris Martin's (Lead singer of Coldplay)daughter "Apple" as well when giving "dap".)
Example: Dude, you got the new iPhone, wow gimmie some Dapples!