Meaning of monkey

(noun) any of various long-tailed primates (excluding the prosimians)

one who is playfully mischievous

(verb) 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"

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