mess around with something

Từ điển Oxford Advanced Learner 8th

ˌmess aˈround with sth derived
(BrE also ˌmess aˈbout with sth)
1. to touch or use sth in a careless and/or annoying way
•Who's been messing around with my computer?
2. to spend time playing with sth, repairing sth, etc.
Main entry: ↑mess_derived