fiddle around with something (also fiddle about with something British English) phrasal verb (see also fiddle)

1. to move the parts of a machine in order to try to make it work or repair it:
I’ve been fiddling around with this old car for months but I still can’t get it to work.

2. to make small unnecessary changes to something – used to show disapproval Synonym : mess around with:
Why did you let her fiddle about with the remote control?
The bus company is always fiddling around with the schedules.

[TahlilGaran] Dictionary of Contemporary English ▲