Monkey meaning

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

one who is playfully mischievous

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”