jacking around

1. Spending time without purpose.

2. Getting involved with, interfering, manipulating or attempting to control another's emotional state of mind. Usually has a negative connotation.

3. One who is unqualified attempting to use, inspect, adjust, assemble, disassemble or generally fool or mess around with something or someone.

> "What have you been up to?"
> "Just jacking around."
> "He has a reputation for jacking around with girls’ minds."
> "I feel like you've just been jacking around with me."
> "Don't be jacking around with your Dad's computer, or he'll have your ass when he gets home."
> "My husband was jacking around with the plumbing to fix that dripping faucet, and now we can't flush the toilets if someone is doing laundry."