An expression, when said, means you really do not care about what someone is saying, or what's going on around you. Recommended to be said sarcastically.
Shithead Neighbor: Hey Tim!
You: Yeah, hi.
Shithead Neighbor: I won the lottery jackpot yesterday! 40 million dollars for me!
You: Well guess what? I don't give two shits if you win 40 million, or 40 cents. Get the fuck out of my face please.