Noun
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one who is playfully mischievous
-
any of various long-tailed primates (excluding the prosimians)
Verb
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do random, unplanned work or activities or spend time idly
"The old lady is usually mucking about in her little house"
- mess around - monkey around - muck about - muck around -
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"