Noun:
1: monkey any of various long-tailed primates (excluding the prosimians)
2: rascal, scallywag, scamp, scalawag, imp, monkey, rapscallion one who is playfully mischievous
Verb:
1: monkey, fiddle, tamper 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: muck around, putter, monkey, muck about, tinker, monkey around, potter, mess around do random, unplanned work or activities or spend time idly; "The old lady is usually mucking about in her little house"