Belgium
chipoter
Meaning
to fiddle with something
Elsewhere
tripoter
Explanation
In France chipoter means to pick at your food, or to quibble. In Belgium it means fiddling about with something, the way France would say tripoter.
Example
Arrête de chipoter dans la serrure, tu vas la casser.
Stop fiddling with the lock, you'll break it.
Origin
From Old French chipe, meaning a rag or a scrap.
Source