1. (

• tamper ,
• fiddle ,
• monkey ,

) play around with or alter or falsify, usually secretively or dishonestly; "Someone tampered with the documents on my desk"; "The reporter fiddle with the facts" ;

2. (

• putter ,
• mess_around ,
• potter ,
• tinker ,
• monkey ,
• monkey_around ,
• muck_about ,
• muck_around

) do random, unplanned work or activities or spend time idly; "The old lady is usually mucking about in her little house" ;