Wiktionary
vb. 1 (context intransitive English) To do random unplanned work or spend time idly 2 (context intransitive English) To do something with a piece of equipment when you do not understand how it works. 3 (context intransitive British English) To be playful; full of fun and high spirits
WordNet
v. do random, unplanned work or activities or spend time idly; "The old lady is usually mucking about in her little house" [syn: putter, mess around, potter, tinker, monkey, monkey around, muck around]
Usage examples of "muck about".
And Im thinking Fuck, I dont want to muck about with the government.
Though they too muck about with dark-lanterns, where they oughtn't?
Though they too muck about with darklanterns, where they oughtn't?
It's only their own flesh'n'blood that they muck about with, eh>.
And the muck about them was full of its own noises--a maddening buzz of insects that worked their way under clothes and armor.
We do not bury our lost beloved for the purpose of having some stranger muck about in the grave and play with the remains.
I specified 'internal problems,' which could be anything in the gut, and that's difficult stuff to muck about with when you don't know what you're doing.