F Around And Find Out
You tell someone to figure it out because you're too dumb or too lazy to do it yourself, and then you laugh when they fail
Why did you break my phone? F around and find out, I'm too cool to help you.
Why is my pizza late? F around and find out, I'm too busy laughing at you.
Why did you fail the test? F around and find out, I'm too lazy to help.