fork off

1. To split and continue on in a different direction. The road's going to fork off to the right in a couple of miles, which will lead you to our cabin. Several people in the group forked off to explore the other side of the mansion. Is it OK if Sophie and I fork off and go this way around the pond? There's usually more frogs over here.

2. A humorous euphemism for "fuck off," an otherwise very rude and aggressive way to tell someone to go away. Fork off, will you? I don't want to hear any more of your ridiculous conspiracy theories. A: "Did you actually think your singing sounded good there?" B: "Oh, just fork off." Fork off, bro, I'm not cleaning up your mess!