Definitions for muck about
putter, mess around, potter, tinker, monkey, monkey around, muck about, muck around(verb)
do random, unplanned work or activities or spend time idly
"The old lady is usually mucking about in her little house"
To do random unplanned work or spend time idly
To do somethings with a piece of equipment when you do not understand how it works.
To be playful; full of fun and high spirits