monkey around vs muck about

monkey around and muck about both are verbs.

Word	Noun	Adjective	Verb	Adverb
monkey around	No	No	Yes	No
muck about	No	No	Yes	No

As verbs, monkey around and muck about are synonyms defined as:

monkey around and muck about: do random, unplanned work or activities or spend time idly

Other synonyms of monkey around include mess around, monkey, muck around, potter, putter, tinker.

monkey around (verb)	muck about (verb)
do random, unplanned work or activities or spend time idly	do random, unplanned work or activities or spend time idly