Fiddle around with Definition 1 of 3Pro Tip 1/3Goalless Play Used when someone is experimenting or passing time without a specific plan in mind. She fiddled around with the app just to see what it could do. Pro Tip 2/3Casual Usage Commonly used in casual or informal situations. When you're bored at home, do you fiddle around with your guitar? Pro Tip 3/3No Clear Outcome Emphasizes an activity where the result isn’t critical or is unknown. I'm just fiddling around with some code, not sure if it'll become anything.