Muck around with

Pro Tip 1/3

Skill Level

Used when someone lacks expertise but still tries to do something complex.

He tried to muck around with the computer code and ended up crashing the system.

Pro Tip 2/3

Potential Harm

Implies that the person’s actions might cause damage or problems.

You might erase important files if you muck around with the software settings.

Pro Tip 3/3

Casual Warning

It's a light-hearted warning to not interfere with something.

Please don't muck around with the thermostat; it's very sensitive.