What is the meaning of monkey?

noun

• Any of various long-tailed primates (excluding the prosimians. )
• One who is playfully mischievous.
  • synonyms: imp, scamp, rascal, rapscallion, scalawag, scallywag

verb

• Play around with or alter or falsify, usually secretively or dishonestly.
  • usage: "Someone tampered with the documents on my desk"; "The reporter fiddle with the facts"
  • synonyms: tamper, fiddle
• Do random, unplanned work or activities or spend time idly.
  • usage: "The old lady is usually mucking about in her little house"
  • synonyms: putter, mess around, potter, tinker, monkey around, muck about, muck around