A cookie-cutter modern rock band with mid-tempo hit songs punctuated by heavy guitars and a disgruntled guy upfront wailing about something or another in a deep, moaning vocal style.
guy 1: "Have you heard the new Nickelback?"
guy 2: "Yeah sounds like the same ur band crap they point out on the last album. All those bands should just combine into one big 'Puddle of NickelCreed' and go jump off of a cliff together."
Means your on my good side, your doing well, when being used positively. The negative definition would be used to shut someone up cause they are being rude, or a no thank you gesture. Can be used either way depending on tone and context.
When your trying to get to know a girl and she decides everything just might happen to be going perfectly, she will hint and say Ur Good. Someone says something rude like Hey lets go do the nasty and dont know you, so you reply nah Ur Good