When you want to fight someone,, or describe what you are going to do to them in the fight.
That beezy was talking mess, she is going to get mollywhopped.
if you have a friend, and they do or have to go to something that you arent interested in.. you say "you have fun with that"
Matt: Damn, guess what.
Miles: Whats up?
Matt: I have to go to Chemistry Class for Summer School again.
Miles: you have fun with that matt.
If someone is bugging you.. or you just dont want to here what they have to say.. you say "go somewhere with that"
Chris: Omg, did you hear about what happened last night?
Miles: What happened
Chris: Ashley and Kampell did it.
Miles: Go somewhere with that, i dont care.