this is something you say when your friend or aquaintence has either done or said something funny or has been own3d by someone and you want to rub it in. It can also be used to express surprise or admiration of a colleague or friend.
It is short for awww nigga and can be used instead of nigga if it is deemed too offensive a word.
DZL: My alternator gotpwn3d by heat from the exhaust manifold!
PeeTar: Awww ngh you didn't win!
The coolest most epic girl you will ever meet. So funny and pretty and bubbly and sweet and the cutest pumpkin that you can call your friend :)) or lover ;)) she is so sweet and nice and you just want to spend every moment with her and always talk to her.